Before people start jumping on me, yes, I'm fully aware of the newer Micro Four Thirds cameras and what they can do, nor am I leaving the system behind (I have 3 bodies and a collection of lenses that I use very heavily for stills and video), this is about me exploring the hobby and seeing what other systems are like. So I am interested in picking up a DSLR and a nifty fifty to play with, mainly for fast AF, the OVF, usable and useful AF tracking of moving targets, good handling with external controls, decent buffer for fast burst shooting, and the inexpensive lens selection down the line. I am not interested in video at all (I have a GH1 for that), don't need more than 12 megapixels and do my own post processing so I'm not concerned with jpeg quality. The one model I've been eyeing is a Canon 40D because of it's rapid fire burst, build quality and relatively inexpensive cost of acquisition, but are there other models I should be looking at? Thanks!