I decided to use the ASUS P4S800 : SiS 648FX FSB 800MHz DDR 400 6 channel audio. Works well - have been using for over 4 months with no problems detected.
Linux 2.6.10-1.737_FC3 (Fedora Core 3 Heidelberg), Intel PentiumŪ 4 2.4GHz Prescott (533MHz) 1MB cache, GEFORCE FX 5200 128MB DDR + TV OUT AGP 8x.
I decided not to risk using the ASUS P4S800-MX SIS661FX Motherboard because I heard there were problems with the video driver. I have no way of knowing if this is true.