Tell me how you guys think this system design is before I go forward and purchase anymore parts.

COMPUTER
Intel BLKDX38BT motherboard
2 x 2gb 1066MHZ DDR3 memory
160gb SATA 3GB/s 7200RPM 8MB CACHE Hard Drive
500w power supply
2 x Saphire Radeon HD 4670PRO DDR3 graphics cards (upto four monitors)
1 ADDITIONAL SOUND CARD
Windows Xp
MFS X

VISUALS
TH2GO WITH TREE MONITORS FOR WINDSCREEN
1 MONITOR FOR LEFT SIDEWINDOW
1 MONITOR FOR RIGHT SIDEWINDOW
1 MONITOR FOR GAUGES BEHIND DASH

THIS WILL BE GOING IN AN ENCLOSED CESSNA COCKPIT. I HAVE BEEN STRUGGLING WITH LCD VS. PROJECTION. IS THE ABOVE SETUP GOING TO DELIVER ENOUGH POWER TO RUN ALL THE MONITORS I WANT? IF NOT, DOES ANYONE HAVE ANY OTHER SOLUTIONS? THANKS FOR YOUR TIME.