I have a 06 coupe and haven't really had any problems, I’ve replaced my front brakes and clutch (due to a slave cylinder malfunction), and that's about all. I’m the second owner bought the car with 32k now have 56k. I would stay away from 6 disc and panoramic sunroof. The intermediate shaft is known to make a clunking sound, which a dealership can take care of by shooting more grease in; it’s not a big deal. I have had many 3.8L so I can compare pretty well. The differences between the two is one is a 60 degree v6 and the other is a 90 degree v6. There not technically related but I will say they both are tested and true. Very reliable, there is obviously a lot more room to mod on a 3.8 because of the aftermarket that’s out there. I have a 2001 grand prix gtp coupe as well. Depending on what kind of car you’re coming from I think you’d be very happy with this car. It makes power all through and is usually a complete sleeper. I can’t really say what an automatic is like, because I have the 6 speed manual, which I will highly recommend!!!! So much fun!!!! Before this car and in addition to the gp gtp I have had a modded gp gt, and a cobalt ss/sc. I use 93 oct in mine because I seem to get better mileage, but it’s not mandatory. I get roughly 26 in town if not better and 32 on the highway! Know you posted this a little while ago but I thought I’d post anyway!!!Good luck