I just got (after recommendations in this thread) Hankook K104s... unreal tyres, I got:
-255 * 40 * 17 (rears, 9 inch rims)
-235 * 45 * 17 (fronts, 8 inch rims)
Very sticky at the moment... I have a stockish R33 GTS-T, and full throttle out of most corners I have problems spinning them at all, lol, and the rear end is very very stable. Wet weather driving is great too. But coming from Falken Ziex 326s, anything is a huge step up.
Will report back in ~10,000kms anyway.