The P-Zero is probably the worst hooking tire built, sidewalls blow out routinely, and they don't make them any more, so most around are hard tires that need shelved. The Invo isn't the great in corners, but goes straight fairly well, and is nearly an inch shorter than stock which isn't ideal. The PS2 is a good all around tire, but huge at nearly 28 inches tall, and rub when aggressively lowered. I have a set of 335/25 PS2's here, and they are just as short as the Invo. No one makes a decent 20 for the GTS. The Invo looks fine to me on an SRT, but on a GTS, if you want your gaps equal, the rear sits lower than the front.
Before the track heroes whine, this is purely a street car.