Well I think the purest driving experience is always going to be had in a lightweight car with a light, free-revving, normally aspirated engine. Cars like the Lotus Elise, Lotus/Caterham 7, new Toyota MR2, etc. However a well designed turbo engine in a lightweight car will be a close second, preferred by some (maybe most) just because of superior power. Lotus Esprit or S15 Silvia comes to mind here. But for most of us, we use our cars for more than just hooning around a track, so some comfort is needed. And the more of that you add, the more weight you have, the more power is required to lug it around. Thus ending up with cars like the Mercedes S600 with its twin-turbo V12
Right now I'm driving a 1st gen RX-7, which comes closest to the first ideal - light, rev-happy n/a engine, very direct feel (except for the steering which is horrid). It does wear a bit thin on longer drives.
For the Skyline, it should be an ultra-high-performance GT car, implying a considerable degree of creature comforts, so the weight will be on the high side. Something like 3500lb with a biggish turbo motor, like a VQ33DETT. Oddly enough that's pretty much what we'll get
But something like that is NOT meant for track use, at least not as stock, not the way an Elise for example is.
Thought to ponder - a normally aspirated engine is just a turbo engine with never-ending lag
Cheers
J