First off, the gtp does not have a northstar. It has ONSTAR.
I own a 97 GTP and can honestly say it is a very fun car to drive. I have a child so I bought the sedan version of the car (used with 62k miles) last spring. It now has 92k miles and the only problem I have had with the car is a bad water pump (replaced it myself, $30.00).
I drive about 80 miles a day with the car and get a consistent 21-24 mpg. I tend to hot foot it alot since the GTP launches very well due to its torque.
It is easy to mod these cars. Swap the stock 3.8 pully for a 3.4 or 3.25 to raise your boost levels.
Replace the stock airbox/filter with a K & N cone or Cold Air Intake to help it breathe better
I have done these 2 mods and can run with the Camaro SS cars and can beat most later model Mustang GT cars... with my 4 door grocery getter. I can consistently blow away Taurus SHO, Audi A4, and walk Nissan Maximas as well. I do get walked myself by most cobras and m5's. WS6's also kick my ass. I'd estimate I am pushing around 280-285 hp, but have never been dynoed so I dont know for sure. One thing to consider is with this engine, you MUST run premium gas due to the supercharger.
It is relatively easy to hit 300+ horsepower with these cars. Other mods would be headers, Reprogrammed PCM, custom exhaust, and rockers or cam. All of these items are readily available for the 3.8 sc motor (L67) which is also found in the Buick Regal GS.
My 1997 GTP comes with eyecue Heads up display (i dont know how I ever drove without this), leather interior, electrochomatic rearview mirror, keyless entry, steering wheel radio controls, and other normal extras. After 6 years and 92,000 miles, everything still works well with no problems.
MadIndian. Stock Gtp's are in the 14's as well. GT's are low 16, high 15 second cars. These engines are very reliable and have been around for decades. They are relatively low tech and are dogs in the top end, but I have no problem getting my car up to 100 (Fastest I have had it) in very little time. These cars really shine off the line. I also wouldnt go as far as to say the 4t65 tranny is bulletproof. Several members who autocross and race their cars on
CLUBGP have had differential problems, output shaft problems, and other problems. Their cars simply make too much hp and torque and blow the trannies. Thrasher has a tranny out that is supposedly the end all of problems, but I dont know much about it. Fact is, I have had no problems at all with my tranny and I am a sucker for stoplight races.
PowerMac4Ever--no, the supercharger does not make the engine any less reliable. In fact, the GTP actually has less compression than the GT and also has stronger internal parts than the NA 3.8 engine so it can accomodate the supercharger better. It does not bring any more dirt into the car because just like a NA (normally aspirated) engine, all air comes in via the airbox and air filter. The volume of air is just much more.
Skoorb, you are so far out there..... The GTP looks better, is faster off the line, and has more options available, all which make it a great car. The GTP is not available in a stick, but many 4 door sedans do not have sticks. A manual transmission is not everything!!.. Having owned a 280zx (5 speed), RX7 (5 speed), and a few other older stick imports, I can honestly say that I prefer the automatic transmission in this car. It has traction control, shifts very well, and is not a dog. Plus, with an aftermarket pcm, you can skip-shift from 1-3 just like you can in a manual transmission. Btw, your estimations suck

its more like.. while the maxima owner is shifting into 1st gear, the gtp owner is already 2 car lengths ahead and getting smaller and smaller as the torque pulls the car away from the maxima. sure, the maxima might catch up at 100+ mph, but by then the race is over.. just in time for the maxima owner to do a racer flyby..
This being said, the maximas (and especially the new altimas) are going to be fun cars to drive. Personally, I'd pick the new altima over the new maxima, but to each his own.