If you're serious about driving, either the Corvette or new GTR. the Gallardo will make people think you're just showing off. Plus they're really common
Of the other two, I'd say the GTR. The Corvette is a bit too cheap feeling and crude for me. Plus the GTR has endless scope for tuning if you think it's getting a bit slow. I'm talking about performance tuning, not ricing.
Despite being a almost 16Y.O. kid, I'm not into ricing at all. I appreciate fine workmanship in paintjobs and vinyls, but not body accessories.
In the end though, If you want serious kudos from me, get a NSX. Basically it says "I'm not prejudiced, i don't care what other people think, I just love to drive". It's a sweet, well rounded, non-OTT car. And being Japanese, I think it can be tuned quite easily as well. Just don't put a turbo on, that would spoil it somewhat