Which clutch...?
 

Which clutch would be best for a pretty standard engine, not really gonna do any mods on it either.
WRX STI Type-R V5 310 bhp 280 lbft

SUBARU IMPREZA 2.0 4WD TURBO FAST ROAD ORGANIC CLUTCH on eBay, also, Subaru, Car Parts, Cars, Parts Vehicles (end time 06-Jul-08 23:26:54 BST)

SUBARU IMPREZA STi WRX & P1 EXEDY CLUTCH KIT 230MM on eBay, also, Subaru, Car Parts, Cars, Parts Vehicles (end time 01-Jul-08 00:36:11 BST)

I like the look of the first one buddy

Google "Techniclutch" before purchasing ;)