I'm not getting into the bashing here, I just wanted to add some Grand Prix/w-body FACTS based on the modding I've done over the past 6 years.
Most people don't mod base GP's, Some do GT's and most start with the SC'd GTP (for obvious reasons) I choose the GP because I like the styling and I have a family of 4.
I ran 14.6 stock in my GTP (slowest was a 14.8)
I ran 14.8 with 75 shot NOS in my GT
I have not had the GXP to the track but 13.7 passes have been repeated on stock setups.
I ran 13.96 for under $500 in my GTP w/stock tune.
I would put the GXP's stock handling up against any other stock setup in it's class. If you ever get a chance to drive a GXP, do it.
Money is a big factor in building a w-body car. The trans is weak in stock form, but all parts needed to make it sub 10's capable are available to the public.
My GTP currently dynoed 493whp on a 100,000mi stock 3800 block. The current setup is IC'd T67 Turbo @18psi.