bought 2 dunlop sp sport maxx tires from tirerack for my rear OEM replacement on my g35 coupe 6mt. installed it for $26 at wal-mart, they run great. very quiet, good grip (but hard to tell since my front OEM pilot sports are worn and loud w/ 28.5k miles on them). i'll probably understeer alot w/ the backs biting hard and the fronts old and slipping. the dunlop's blow away the bridgestone potenza s-03 (which i was going to buy) from a test performed by tirerack:

http://www.tirerack.com/tires/tests/...=SP+Sport+Maxx

only drawback is thath the tires are 2 lbs heavier than the pilots but 2 lbs lighter than the potenza's which weigh alot (30 lbs for 245/45/R18).