i would say get the r34 if you're into performance.....
tested fd2r = very nice high revving machine, nice for a daily driver with good response, but the G pull not that fun
350z = sexy curves, chick magnet, but just doesnt cut it unless u tune it up
rx8 = cheap road tax, nice curves, if u dont mind dealing with rotary plus not really a performance car unless its an rx7
r34 gtr = one of the most awesome cars ive driven so far and enjoying every second of it without regrets until today.....u can eat most of the cars mentioned.....
e60 = awesome luxury car, fuel guzzler but not a performance car unless it's an m5