A few years ago when I just got into photography by buying a rebel XTi, I paid 800 bucks for it up front when it was just released. I didn't know anything at all about ISO, aperture or shutter speed because I've never even heard those terms. While shelling out all my 2 years worth of savings (I was a poor college student) for a camera I didn't know how to use, I looked at "pro" cameras and their prices and I thought those were just ridiculous.
Now, years later, shelling out another few years worth of savings for a 5D with some glass, I looked at how much I spent on what grew to be a hobby and the only reaction is just "Meh"
On the side note, I honestly don't see a reason to get a 50d/60d camera at all. You either shoot with a rebel because you're learning and you can't afford anything else, or you save up, you know what your rebel limitations are, and you go get a 7D or a 5D. Back when I was looking for an upgrade 50/60D was just never enough to go up a tier.
I mean put some L glass on that rebel and it won't disappoint with IQ. Is 60D better for photos? Nah not really. All around stats on it are closer to a semi pro dslr but they're not really there. While you can compare a rebel to a 60D, between 60D and 7D for example, there is just no comparison.
I am actually interested if someone upgraded a rebel to 50/60D, why'd they do it. Maybe throwing 50D into the mix isn't really fair, it's a much better camera than 60D and when it came out, it was basically as high up as 7D is now so upgrading an XTi to 50D was worth it, but with these new rebels and with 60D..I am not sure.