Instead of looking at megapixels, which most people do because of the whole marketing and megapixel race of different competing brands, I tend to look at sensor size as well. This is one of the most important. Also, I would look at features and specifications like what free accessories it comes with or what in-camera settings and editing features I can do. I would also prefer a DSLR that already has a video feature. Although always keep in mind that the lower end DSLRs, although marketed to have high definition video, is not as nice as you'd think.
Right now, I'd go for the Canon 60D just because I really like the video quality and at the same time it comes with a 50mm prime lens as its kit lens. My biggest problem though is that I am currently a Nikon user so I might waste all my lenses and might just go for a D7000 so I can still use my Nikon lenses.