the ECS K7S5A is an excellent ONLY if you're not overclocking...it has no voltage, fsb, or multiplier tweaks/adjustments.
otherwise, you don't get VIA southbridge issues, probably the best DDR chipset performance (and SDR for that matter), onboard LAN, and it costs half of what other boards cost...cheapest i've seen it is 62.50..newegg (i believe) has it for 65.
if you want tweak options, Epox makes both an excellent 761 and kt266 board...check the soltek SL-75DRV as well...good inexpensive board w/ all the tweak options.