if you dont drive the car hard, and its mostly stock then just get the oem nissan one.
courtesyparts.com has them always.
If your car has some mods and you want alittle improvement over stock look for a "stage 1" type clutch. centerforce and act clutches are good but realize the farther up you go the stronger the clutch is. a good thing? not necessarily!
if you get a stage 3 clutch for a car with 150hp, the clutch will literally be an almost on/off operation. go with something that matches your power. i speak from experience here
new clutch parts:
Throwout BearingClutch DiskPressure PlatePilot Bushing
Should also bleed the clutch with fresh fluid and resurface the flywheel.