the fastest turbo car i've been in was a MKIV supra. had a 61mm turbo, "only" 600whp on 100octane, but the torque curve was ENORMOUS.
been in multiple ~350whp MR2s, and they're ridiculously fun.
drove an immaculate MK1.5 MR2 (AW11 w/ genIII 3SGTE).
driven STi's and WRX's a few times, as well as an LGT or two.
was in a 400whp Evo that seemed, almost sluggish? he had dyno graphs to prove it, but the car just didn't feel as fast as i would have expected.
the first turbo car i was ever in was actually an MR2 that i was looking at buying. i was hooked from that point onward.
you should hear my MR2 sometime in person. right now my redline is 7800rpm. here's a video of me driving it at an autox:
it makes fun noises when my rev limiter kicks in!
i agree though, a well-tuned n/a engine sounds like nothing else, and i sincerely hope for many reasons that the FT86 is, in fact, n/a when it is released.
-Mike