I5 2500K Gaming System

MOBO ASUS Sabertooth P67
CPU Intel - Core i5 2500K
RAM Patriot - PXD38G1600LLK Viper 2 Edition (2x4GB) DDR3 1600
VGA EVGA - GeForce GTX 570 SuperClock
HDD WDC SATA3 Caviar Black 1TB 64M
DVD LG DVD-RW (Box)
PSU Tagan - BZ 800W
Casing Thermaltake Level 10GT
Cooler Gelid Solution Traquillo
Monitor Samsung 23 Inch PX2370 HDMI
kybord Razer Lycosa Mirror
Mouse Razer Mamba
Speaker Logitech z5500


is it good value if i build my system for high end gaming?

it will cost me around USD $2.555

If anyone can give me advice for cheaper system with good performance please do so.

(sorry for bad english)

Thank