^Aces, not sure about the 60D specs, but about the sensor you are dead wrong - it's the same one as on the 7D and 550D, although the 7D has more readout channels 8 vs 4. Not sure, but I remember reading something on this. Regards your reply about the 7D and low light and lens being more important - Yes, lens are very important. But given the same lens under the same lighting with different bodies?
There is a noticeable difference at ISO 1600 on the 50D VS 7D. And I'm not even using 100% crops. I see grain on the 7D images, but there's more smearing on the 50D. When I was in Taiwan, I got a couple of shots off a 40D, even that seemed to have less grain, although I didn't have a 7D with me then.
The 60D is a more consumer-oriented model than the 50D. For me, the body is very important. If I could have afforded a 5D MK2, with L-only glass, I'd have gone for it eyes closed.
Agree on the 7Ds focussing. I've gotten some really tough-to-focus shots off, with perfect focussing. Over the 50D, it's almost uncanny how the 7D seems to focus on what you want it to focus on. Although cross points aren't a huge deal, unless your subject is moving, or you are
Which is why the 39 point system on the D7000 might be worth looking at. When shooting products/jewellery/static objects, I've found that even 5 focussing points are enough. dSLRs are just becoming more consumerish, for wider possible usage patterns and idiot proof on the focussing. Of course, if you want to shoot your kids or pets that are running around then
more focussing points is always a good thing.
I'd suggest the OP wait for a good D7000 review. And then choose between that and the 7D. You're guaranteed a body that you'll keep for 4-5 years ;-)