Since I got my 30D years ago, I've switched mostly to full frame, with a 1 series and a 5d3. But I still love shooting wide with my 10-22 lens, which obviously won't work on the FF cameras.
Despite what's technically only a small diff between the 10-22 on a crop sensor and the 17-40 on full frame, I love the look the 10-22 gives me all the way down at 10mm. Maybe I'm crazy.
The 30D is a terrific camera, but I've been spoiled by the huge FF files -- the 30D files seem a little undersized to me now, and they don't stand up to aggressive post-processing nearly as well as the bigger ones. So I'm looking to upgrade to a crop camera with more megapixels. Given what I've spent on the FFs, I'm looking on the used market for something better but affordable (which rules out the shiny new stuff).
I'd appreciate any advice from those who have gone the crop upgrade route. I had my eye on a used 50D, but I could conceivably go higher, and I have no hands-on experience with any of the crops past the 30D. Thanks for any help.