I always thought the '94-04 cars were butt ugly. The '03-04 Cobra is the only one that is even livable as far as appearance goes, and it's nice that it can support ~800rwhp with most of the stock drivetrain.
But the '11+ cars are so much better in every way that it's not even a contest. If you're trying to make over 700hp, get the Cobra. For daily driving and a really fast car that you don't have to treat like a garage queen, the new GTs are the way to go.
2012 P8C, HP, 300A, 55D, 457