Our car is not very large, but it looks like a toy when parked next to a monster like this :-)
I have heard people asking each other this question quite often, and 95% of the time the answer (and it’s ground) was wrong.
The correct answer is: IT DOES NOT MATTER.
The task of the camera is only to register whatever comes through the lens, to process it and to save to a memory card. All cameras which are currently on the market have enough processing power that makes your shooting comfortable. In-built cardreaders are actually the same.
Shooting speed – does not matter, unless you do sports photography for a living.
Fullframe or cropped sensor – really matters to a very few. And even less people can tell you for sure was the photo shot on full frame or on a cropped sensor. Can not belive? Ask any of your colleagues or family members.
Lots of shooting modes – does not matter, 100% of them can be done in Photoshop or any other editing software which you are using anyway.
Megapixels – the fact is, the more pixels you have on the same sensor, the more they influence each other and the more noise you are getting on your photo.
High ISO support – will either give you more noise, or steal details of your photo. Shooting at night, you would be better off using, for example, 85mm F 1.4 lens rather than kit 5,6 lens (on its tele- end).
Stabilizer system – again, you can do better with F 1.4 lens, rather than with F5.6 stabilized lens.
What matters then? The lens. It is the component which delivers the light to the camera’s sensor. If you just got a fancy professional camera body, but have no money left for good lens – congratulations on the most stupid investment you could ever possibly make. With cheap, “slow” and blurry lens you are losing all the advantages of a good camera. When you finally understand that you need a faster, sharper lens, and while saving money for it (as good lens are almost never cheap), your fancy camera will become obsolete and salesguys in the supermarkets will start brainwashing you into buying “a next generation model with even more megapixels and frames per second”. Uhuh.
Think about what you like to shoot. I guess you have thought about that already, as it must have been a reason for upgrading from point-and-shoot/iphone camera to DSLR.
Portraits? Travelling? Wild nature? Macro? Kids? There are lens for every task – some are smaller in size and easier to lug around, some are all-in-ones (ultrazooms), some will give you perfect bokeh, some can reach to the opposite side of a football field, some will allow you to take pictures of your permanently moving child without killing your kid’s eyes with flash, etc.
When the lens (or lenses) is selected, get it, and get the camera body which fits it for the rest of your photo budget. Hint: as new camera models come out, the price for previous models drops, a lot. Use that!
Most of the DSLR camera bodies are designed to shoot up to 100 000 – 150 000 frames. Depending on how you use the camera, it will serve you slightly longer or a bit less, but it will die in several years anyway. Or you will become a professional sports photographer and will need more frames per second out of your camera, so you will upgrade. But the lens are designed to serve at least 10 years, and much longer if used with care, so this is a true investment you make.
You can only make the right choise if you spend some time on reading lens reviews and price lists. Of course you are going to do that, as you really want to get exactly what you need, don’t you? As if you don’t, we can come back to the first point of this topic – IT DOES NOT MATTER :)