If there were specific phones, I'd say I was interested in the Galaxy Nexus or the Galaxy Note. I never thought of breaking a contract for either. Really though, I'm more interested in Ice Cream Sandwich.
I had an Epic 4G, but I recently used their promotion to reset my eligibility ($65 fee) so I could get an iPhone 4S and I'm completely satisfied with the move. WiFi/4G/3G/GPS were too unstable for me to find using the phone entirely enjoyable. I guess something was just wrong with the two Epics I had, because I didn't find the phone to be as fast as advertised. The apps I used just felt laggy and it made playing games on it unbearable. There were some basic OS features I liked that I think the iPhone could use, though, but I digress. The Epic 4G was my only Android, but it left a pretty bad taste in my mouth.
In any case, I like how open the OS is, and I think ICS is trying to address the issue of fragmentation. The only "phone envy" I ever had once my Epic 4G started going down the drain was for the iPhone 4S. However, I won't be curious about owning any specific Android phones until ICS devices (or whatever tasty dessert is next) become more prominent in the market.