i'm gonna break down and buy the torq thrust classics, but I don't know if i want 17x9.5 or 11 inch on the rear. What kind of problem would I run into if I did go with the 11 inch? I'll probably end up sticking with the 9.5 on all four just so I can rotate the tires, but if there was some reason that would rule out the 11s all together it would make me feel better

 

17x11's would work in the back with a little hammering of the wheel well. I personally have 17x9.5" TT2's all the way around and absolutely love them! A big plus is when it comes time for tire rotation...