I'm in an all-Dell shop and am contemplating buying one of these to use as an "emergency gateway server" in case my primary fails. It'll let me take the primary out of service to upgrade its OS. Has anyone installed CentOS on one of these? Any gotchas? It looks like I can buy this model with these tweaks for about $480: AMD Athlon 64 X2 Dual-Core 3600+ FreeDOS included in the box, ready to install 2GB Dual Channel DDR2 SDRAM at 667MHz- 2DIMMs Free Upgrade from 80GB to 160GB (7200RPM) w/DataBurst Cache 16X DVD-ROM Drive NVIDIA GeForce 6150 LE Integrated Graphics GPU Integrated 7.1 Channel Audio