I've had my G8 since January, about 5000 miles and love it !! Soul of a GTO in a four door; poor mans Cadillac CTS-V, etc. Haven't done much in the way of mods because unless you are doing track time, it doesn't need any. Over the years I've owned many Pontiacs and this is the best one yet. Too bad they're killing it off now.
I've visited the G8 Forum mostly. LOTS of very enthusiastic people there with lots of knowledge on any subject.