The R34 GTT RB25 is NEO, so isn't it supposed to be more fuel efficient? What's the fuel efficieny figures for the R34 GTT then?
Looks fugly, won't go near as quick as the other 3, is over priced, spare parts will burn a hole in your pocket, is FWD etc. Need I say more?
WRX Sti sounds the best out of the 3. Is the quickest, has a nice interior, AWD, but is dog ugly on the outside.
JDM S15 Silvia is nearly as quick as the Sti. Is a more 'fun' car than the other 2 as it is relatively light. Don't discount the 4 pot. The SR20 is an extremely tough little power-house that loves to rev. It looks frickin hot on the outside, and is very nicely styled on the inside (bar the cheap looking hand brake).
R34GT-T looks the toughest and most aggresive out of them all. Best thing is it's the most unique/original (in Australia) as they are still relatively rare. Interior is very bland, exterior mainly looks the best with a decent kit on. It's the slowest (stock) of the 3. But as you know, has the 6 cylinder.
IMO, go the JDM S15. It would be the most fun out of all 3. You can use it as a daily, a track or a drift car and will be the most entertaining drive. Sti is way too expensive, but for pure all round performance, you can't go past it.... unless you want an EVO.