Bridge Cameras:
At the moment I don't really recommend bridge cameras because if you look at the sensor sizes available vs everything else you are more likely to be better off with a DSLR and a decent all round lens for similar money and much better image quality. There are definitely some good cameras in this bracket though.
Mirrorless Cameras:
This class of camera has come on leaps and bounds in the last few years, mainly spearheaded by Sony cramming it's massive sensors into the tinniest bodies it can imagine and then updating them at a serious rate of knots (Canon and Nikon are finally realising this is the way forward!). These cameras come right off the bat with features like wifi for sending pictures to your phone for social media (or a quick backup as I recently used on holiday) and controlling all the features right from your palm. The lens selection is ever growing and these chaps are still small enough to not be an effort to lug around. My first pick is the Sony A7iii which jams a full frame sensor and 5-axis stabilisation (helps removes camera shake) into a very small package for £1500 (not cheap but the quality is very high for a small camera). You can get the earlier model (A7ii) for much cheaper which retains a lot of the features but has a smaller batter and no joystick. Depending on your budget Fuji make some great cameras that can be cheaper, I very much liked using the X-E3 I tried out a few months back.
Sony A7iii
DSLR:
Honestly I don’t think the future is DSLR anymore, all of the major manufacturers are moving onto mirrorless and I believe it’s where we are headed.
Price: Around £500
In this price bracket you have to be a bit careful as you are going to be sacrificing something. The first thing to suffer at this price is the lenses as good zoom lenses are a bit more expensive. What you are able to do is pick up a good prime lens (has a fixed focal length (no zoom) but kicks the arse of the standard kit lens you get with the cheaper cameras and is great for portraits if you stand a little back.) You can pick up a Sony A6300 on ebay for about £400 with the 16-50mm lens (good for landscapes and people photos). Due to these cameras being "Crop" sensor bodies you get a multiplication factor if you put a normal "full frame" lens on them. This means that putting a 50mm f1.8 lens (£180 on ebay) comes out at roughly 80mm which is great for portraits and a bit more zoom along with allowing you to throw the background out of focus. This comes out to around £580.
Sony A6300
Price: Around £1000
Once your budget goes up a bit more I would immediately suggest picking up the Sony E 18-200mm. For about £450 you get a lens that will fit pretty much all your needs (I wack this on a camera when i go skiing). It goes from pretty wide to zoomed and has stabilisation to help you hand hold shots at slower shutter speeds. Depending on whether you are getting your camera new or second hand you could combine it with a new a6000 (£473) or a second hand a6300 to come out at £900. If you are considering DSLRs Canon do a similar 18-200 but i’m not quite sure what body you would pare that with. A second hand 7dmkii would be great but seem prehistoric in comparison to the a6300.
Sony 18-200mm
Price: Around £1500
The only thing I would change at this price point is upgrade the body to the new A6500 which comes with a leap in focusing ability, in body stabilisation and the ability to shoot faster. I would still use the same zoom until you find you need something more specific. Something to consider at this price point might be going full frame instead. You can pick up an A7 for £850 and the Sony 24-70 F4 for a total of £1600 which would be good going forward. I’d definitely look at getting a clean looking (with box etc) higher up model from Ebay though.
Sony 24-70mm F4
Sony A7
Price: £2k+
In this price bracket for Sony I would go straight for the A7iii, it’s jam packed with the latest features and honestly makes me wonder sometimes why I sprung for the A9. You have now stepped up to a full frame camera body and because of this you can't use the previously stated zoom any more. You can get the A7iii Mkiii with a 28-70 lens for £1860 which will look after most of your needs but after that it get's expensive pretty quickly. Once you’ve shot quite a bit you might consider adding a prime or a different zoom.
Sony A7iii with 28-70mm Kit
And the rest..
Depending on how serious your photography is going to be after this point you will be looking at multiple zoom lenses that let in lots of light and give you that out of focus background that everyone loves (you can get this with primes for much cheaper but lose the flexibility). My staples are the Sony 24-70mm f2.8 (the lower the number f the more blurry you can make the background and the darker the environment you can shoot in) and the 70-200mm f2.8, I will not go anywhere without them.
Sony 24-70mm F2.8
Sony 70-200mm F2.8
To Finish
I realise I have listed a lot of Sony gear but this is what I’ve chosen to use personally and feel is the best at the moment. If you feel like you align with another brand better (Fuji maybe) then hopefully you can see my thought process through the budgeting and lens choices. You can then apply this to all cameras you are considering. I definitely recommend looking for bargains second hand but you have to be a bit more careful. Cameras are like cars in that they lose a chunk of value initially but that slows down over time. Lenses by main brands such as Canon have historically held their value very well (better than Sony but I think that is improving). It makes the maths easier if you think of potential resale values down the line. An example would be my Canon 24-70 f2.8. Bought for £1429 in 2013 and sold for £1066 in 2018 which doesn’t seem that bad.