I think the next logical step for any of us chasing crazy #s is awd + a lighter platform, that basically sends you to a few options, the 911 turbo's, the huracan/r8 platform or the r35 gtr platform, everything else either doesn't have the aftermarket support yet, cost too much effort/money to build or can't put the power down on the street.
The big 3 (911/huracan/gtr) at 700/800 whp are equivalent to what our hellcats can do at 1100-1200 whp, plus these cars are hooking 100x better than us, only differentiating factor is the price, we are just about at the 90-100k price range tops, these cars are anywhere from 150k-400k.