In agreement to most of the ideas in the thread already, OP probably isn't going to feel much enjoyment moving to the GTR if it's to get more of a visceral feel of speed, unless you really raise the power level. But then as others have stated in general driving that probably won't have the desired effect, not if you want to keep your license.
Perhaps getting a dreary daily and a silly weekend toy would be more beneficial?
Perhaps getting a dreary daily and a silly weekend toy would be more beneficial?