[S65V8]

R8 V8 w/ Stasis would work well. V10 looks / sounds great too, but have heard better things about moding the V8 version. Do some research, I think you might find the same results. 911T would be the easiest to get to higher HPs, but like you said, it's been so overdone and it's not special any longer.

I know you said no Lambo Gallardo, but as long as you get it in black and not fire orange with neon bits, it shouldn't much more extroverted than the R8 V10. You can get the Heffner set-up @ 1000hp and call it a day.