The only two boards I've _really_ liked:
1. Abit NF7 ... A bit of trouble with the NB fan, but the usual zalman heatsink job cleaned that up real fast. Has been stable, even wading through it's current ram mess(1 PC2100 kingston value, 1 PC2700 spectec, 1 PC3200 rosewill)
2. Asus SP97-V ... Socket 7, Rock solid, soon to be installed as a router for my home network. Integrated video faster then some PCI cards. All the normal OC goodies for it's time, like ram timings, undocumented jumper positions, etc. Even integrated USB and IR...ATX and AT form factors. Tested and works with both, Even in it's current hybrid state of AT case with ATX PSU (reset button is power switch). Too bad it's only got ATA33...