Considering upgrading some components to go from 3 to 5 boxing, a little advice would be appreciated.

Current Setup:
  • ASUS P5E LGA 775 Intel X38 ATX Intel Motherboard
  • Patriot Extreme Performance 4GB (4 x 1GB) 240-Pin DDR2 SDRAM DDR2 1200 (PC2 9600)
  • Intel Xeon E3110 Wolfdale 3.0GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor (Relabeled e8400 desktop proc, don't ask)
  • BFG Tech BFGE88512GTSE GeForce 8800GTS (G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
  • Windows XP Media Center Edition

Considering:
I'm wondering if this would be sufficient to run 4x 800x600 and 1x 1920x1200 pretty smoothly (off just the one video card, two monitors)
First monitor = 1280x1024 so each instance would be scaled to 640x480, second monitor = 1920x1200