http://www.caranddriver.com/comparisons/...he-911-gt3.htmlHere's the latest Corvette/Porsche comparison by Car & Driver, in case it hasn't been posted yet. The Z06 edged out the GT3 by one point (out of 200), but that was only because that Z06 scored 11 points higher in the price category. Otherwise the GT3 would have won by about 10 points. Bottom line: the testers said that for the money the Corvette couldn't be beat, but they'd rather own the Porsche if they could afford it.
Obviously, the GT3 costs about twice the Corvette. But I wonder if it's appropriate, really, to compare the top-of-the-line Corvette against a mid-range 911. That's what the C2S is now, when you consider the C4S, the GT3, and the Turbo, and probably the GT2 to come. It seems like a fairer comparision would be the base Corvette against the C2 or C2S.
Anyway, the Corvette seems like a great car. If I weren't such a dyed-in-the-wool Porsche guy, I might try one. Like has been said repeatedly above, it all depends on what you want. Enjoy your Corvette!