I just got an email saying that JSCSpeed.com is offering 12% off Gates belts, water pumps, and pulleys from 2/14/12 - 2/29/12 if you use coupon code: GetGates. I got my goodies (all pulleys, tensioner, timing belt, water pump, gaskets/hardware, thermostat, etc.) from RallySportDirect.com a while back using a similar coupon that was emailed to me. You might want to avoid using the Gates racing blue belt since the color can rub off on the pulleys and cause them to slip. I bought an OEM replacement black belt for mine.
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)