Well, I bit the bullet and got the crossgrade. I'd been considering getting Cubase last year but found it too expensive and instead upgraded to Sonar Platinum from 8.5 because Cakewalk gave a great upgrade discount at the time. This is significantly less expensive than it was when I was shopping around before, so I'm happy about it. It works fine on my computer. I ordered the crossgrade from Sweetwater and picked up an elicenser from the local Guitar Center, and within a few hours of my order I was up and running.
There's obviously a ton to learn about how Cubase works. Basic recording is just different enough from the Sonar workflow that I found myself very frustrated last night when just trying to record and listen back to a vocal track (and frankly that was super easy to do in my quick demo of Studio One, so if your highest priority is to get a DAW that's immediately intuitive to work with and you don't want to mess around with a bunch of settings, I'd probably recommend Studio One).
But I'm excited about all the features that come with Cubase. I don't consider it bloat just because it's complex.