I'm no fan of the GTO. But if you ever watch The Speed Channal, they sometimes show Australian road races, where Holdens and Falcons do battle on a regular basis. Now even though these are race prepared cars, the GTO was based on the Holden platform, so if you want to make it handle better, there are probably any number of ways of doing it.
But when the Crossfire handles so good right off the show room floor, why bother?
Mr2Turbo, I'm 6'2" and 215lbs. and I've spent over 12 hours straight in my Crossfire's saddle, and never got out of my car feeling sore. It fits me like a glove.