why spend so much money on ram that really doesnt do anything? DDR3 over DDR2 isnt even a 10% Performance increase.... Performance ram is totally unneeded. The only thing that matters when your buying ram is if it will be stopping you from Overclocking your cpu, and the amount of ram. 2x2GB of PC 8500 is more than enough.
If ur fine with RMA's and u really want some higher end ram, id get these:
Corsair XMS2 Dominator TWIN2X4096-8500C5DF 4GB 2X2GB PC2-8500 DDR2-1066 CL5-5-5-15 240PIN Memory Kit - DirectCanada
Other than that dont splurge on the higher end stuff because it really makes no difference.
My 2 cents :)
Poster above me made good suggestions as well, except if i was you i wouldnt spend more than $50 on ram