The K7S5A was outstanding in its time, and still decent now for its price, but it has been overshadowed by its younger siblings, the K7S6A, based on the SiS745 chipset(an update of the SiS735 that the K7S5A used) and the new K7VTA v3.1, based on the VIA KT333A. The K7VTA v3.1 is only a few bucks more than the K7S5A over here, and is even cheaper than the K7S6A, performs better, and has more features(supports PC2700 DDR-SDRAM, on-board sound/LAN, optional ATA100-RAID controller, etc).
The bottom line is, if you want a nice, fast system and aren't an avid overclocker, the K7VTA v3.1 can't be beat. I've just fixed up a new system for my dad(with a few parts from his previous system) with the K7VTA v3.1, and its both stable and fast, not to mention ridiculously cheap when compared to any other motherboard of comparable performance.