Yeah, I hear you. I started with a Sony a300 with some older Minolta lenses. Then decided to go with a Canon T3i. I had a Tamron 17-50 2.8, Canon 50mm 1.8, and Canon 70-300mm 4-5.6 USM. I used this setup for over a year, and decided it was time to upgrade. My only course of action with Canon was to go with a 7D or higher, since the 60D wouldn't have been a big upgrade over the T3i. As far as lenses, I would have had to get some L lenses to really upgrade over what I already had. It would have been more money than I was willing to spend. I've been doing a lot of reading in the last few months trying to decide between going back to Sony, or trying Nikon.
Ultimately, I decided on Nikon because they have way more lenses and product support than Sony does, and people that shoot with Nikon really seemed to like them.