Still loving my Stryker Blue Metallic A6 - I've only put 2400 miles on it but starting to get into it a little every now and then and amazed at the torque difference between it and my 2008 GT. AWesome car.
I'm interested in how you compare your GXP to your 455 HO!
1965 GTO - 439CI Poncho (440 hp/510 tq), 3 2bbl carbs (tripower!), M20-4speed, Pro-Touring treatment (13"/12" brakes, fast ratio PS, tubular control arms, Global West suspension, etc.), 18" AR TT2 Classic wheels
2005 GTO - Cyclone Grey, M6 - VMR V803s with 235/35 & 275/30-19s; EE Catch Can; Revenge Designs Rear Spoiler; JBA headers; Tune; GMM shifter
2009 G8 GT - MSM with Onyx/Red - Premium & Sport - Chrome lugnuts, VG Sharkfin