Well I'd consider switching only because some of the kind of city driving I do is on pretty bumpy roads... Really I'd like both. LOL. I'm a little car crazy. Still the gto has its strong points right where the xfire has its weak points, and vice versa. GTOs steering and handling aren't quite as bad as I've made them out to be. Lateral grip is pretty good on the GTO, turning radius is small, just has an odd ride quality at times that I associate with a Jeep. (Springs in the suspension ? I'm not much of a techie. However the suspension was designed for Australian roads which are not so good).

Next year's model is going to be 400 hp with 395 lbs torque.

I'd get an SRT6 except my one issue with the xfire is ride quality over bumps/comfort. Maybe I should revisit the smaller wheel idea. My roads (and spine) are not the same as yours. Also I only like manual shifts.