hi, im building a new gaming computer and theses are the things i am going to use. can u give me any advice on it and if i should change something to save me money this costing me about:$800
GIGABYTE GA-MA790XT-UD4P
AMD Phenom II 550 Dual-Core 3.1GHz CPU
XION SOLARIES 403 GAMING MEDI TOWER CASE
Corsair TW3X4G1333C9 4GB KIT DDR3 RAM
PSU 680W 680 watt ATX Gaming
ThermalTake XTuner IR Wireless Bay Fan Controller A2203
NVIDIA GEFORCE 9800 GT 9800GT 512MB DDR3 VIDEO CARD
GIGABYTE GA-MA790XT-UD4P
AMD Phenom II 550 Dual-Core 3.1GHz CPU
XION SOLARIES 403 GAMING MEDI TOWER CASE
Corsair TW3X4G1333C9 4GB KIT DDR3 RAM
PSU 680W 680 watt ATX Gaming
ThermalTake XTuner IR Wireless Bay Fan Controller A2203
NVIDIA GEFORCE 9800 GT 9800GT 512MB DDR3 VIDEO CARD