Old Skool update time.
A quick run-down, Skylines.
C10
Hakosuka
C110
Kenmeri
C210
Japan
R30 pre-facelift
R30 post-facelift
Tekamen
R31
Personally, out of them all, I'd have the Hako. It just looks 'right' IMO.
It's a shame that if you want a genuine KPGC10 GT-R, you're looking at the thick end of 997 Turbo money. You can pick up loads of replicas based on the "regular" KGC10 GT though, for reasonable money, ie £40-£50k. Mint cars though, so much cool factor.
The Kenmari's and Hako's are favourites for Boso too, huge external oil coolers, upswept pipes, big chin spoilers etc. I think they look cool, but not everyone's cuppa. lol.
The R30/31 is the ugly duckling IMO. But they can be made to look pretty brutal... I think that's the charm. I'd still like one for the rarity though. lol
Mint.