Actually, I could afford the GMPP. Which BTW is still good for 23k miles or Jan, 2013.
Torque, torque is albeit removed by the N* T/C circuit. With it off, the GXP can roast the tires. With experienced drivers of each, stock against stock, this is way less than a full second between them. That said, yes you can do alot more modding to change this with the 3800. But then again, Modded or not, 60-150+ belongs to the N*. If you would have clamped down on the throttle into second gear @ 70MPH, you would have felt the torque and breathe the GXP can achieve. Quite the experience managing the torque steering. It is a highway cruiser. Given the uniqueness and style, I'm happy with my GXP. I'd like a little more off the line pep, but if that became my prime consideration, I wouldn't be shopping for a Bonneville to begin with. Alot of work and maintenance to get a large semi luxury car into 12'*. They come of the showroom floors much quicker these days and built for it.