A few things I take into consideration when talking about gear selection are:

1. The system. When you get a DSLR you are investing in a system. So look at ALL the supporting lenses flashes, cables...etc to figure out who will give you an upgrade path your happy with.

2. Longevity of the company. This is smart in almost ANY purchase...not just camera gear. But it is especially important in these years of uncertianty in camera companys folding.

3. Ergonomics....go out and play with the cameras in the store. Take some time to get used to their way of making changes in the camera....some are more button and wheel approach to normal settings...some are more menu based, some are in between. See how it fits in your hand, and how balanced it is with the lenses your considering.

4. Features. Find one that gives you all the features you need for the type of photography your considering. Is flash important? Sensor size? Noise handling? Metering? Focus system?

These are areas that would influence the type of camera I would purchase.

As far as output quality.....usually most brands are so good these days (even in the base modles)....that the quality is more up to you and your skillsets than the abilitys of the camera.

Roman