Here's why I got a GT.
The V6's were about the same price. I bought my GT with 13,500 miles for about $20K and the V6's with 7,000 miles were like $22,000. This was back in Dec 08.
2004 IW Pontiac Grand Prix GTP
2008 IOM Pontiac G8 GT
GO Mods: Kooks 1 3/4" Headers w/ Durachrome coating by PM-FL, Kooks Catted X-pipe, Solo axlebacks w/ j-pipes, VaraRam intake, VMS 93 Octane ECM/TCM tune, a bunch of Pedders I still need to install
356 rwhp/ 370 rwtq
SHOW Mods: 20% tint all around, polished Camaro 20's w/ 245/35/20 Nitto NT555 fronts and 275/30/20 Nitto NT555 rears, detailed with Adam's.