keep them all coming. i'm looking at great responses

 

why not just run the Pilot Sport A/S? They're on closeout at tirerack with the new A/S Plus replacing them, and the 245/45 size is only $145/tire I'd just run the same size all around if i were you. 235/40 is shorter than the stock 225/45 for the front. While the 245/45 is slightly taller than the 225/45, it's better than the 235/40 option you want to run. And cheaper.
-GP-