My first concern with your setup would be to upgrade the PSU to a minimum 650W. Your PSU is underpowered for your hardware.
Your Mobo is Dual Channel so you will want a matched pair of RAM and not the Triple Channel set you linked to.
A 2X2GB matched pair of 1066 or 133MHz would be the best option to give you plenty of RAM.
G.SKILL 4GB (2 x 2GB) DDR3 1333 $47: Newegg.com - G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Kit Desktop Memory Model F3-10600CL8D-4GBHK
CORSAIR XMS 4GB (2 x 2GB) DDR3 1333 $50: Newegg.com - CORSAIR XMS 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 Ultra Stable Desktop Memory Model CMX4GX3M2A1333C8
Your Mobo is Dual Channel so you will want a matched pair of RAM and not the Triple Channel set you linked to.
A 2X2GB matched pair of 1066 or 133MHz would be the best option to give you plenty of RAM.
G.SKILL 4GB (2 x 2GB) DDR3 1333 $47: Newegg.com - G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Kit Desktop Memory Model F3-10600CL8D-4GBHK
CORSAIR XMS 4GB (2 x 2GB) DDR3 1333 $50: Newegg.com - CORSAIR XMS 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 Ultra Stable Desktop Memory Model CMX4GX3M2A1333C8