So I used to have the basic 04 Grand Prix GT since '06 then went and bought the '04 GTP and have loved it up until April of this year. With that dying, I'm buying the 2008 GXP this Friday and I'm so hyped up I can't wait! But my question is, what can I expect in terms of major and minor differences between my '04 GTP and the '08 GXP. Are there any subtleties that aren't listed on the spec sheet?