I built a computer for my wife using the ECS K7S5A. It's been running rock solid for over 6 months now. The CPU is a Duron 750 at 933 MHz (1.85 v), which means it's running at 124 MHz FSB. This bus speed is interesting because the PCI bus should be at 41.3 MHz, but is running at 31 MHz instead. The reason I bring this up is because the ECS board does have overclocking options if you get creative (remember the L7 bridges).
I highly recommend this board and hear that it is the board of choice for the 1 GHz Duron at the moment because of cost/performance ratio; sometimes Fry's sells this combo for $89! A good many people are running the 1 GHz Duron on this board because for under $100 you can have a system that will run at 1.33 GHz at default voltage in alot of cases. I know you said overclocking is not your bag, but if you can run the chip at 1330 @ default voltage STABLE then why not overclock?
EDIT: BTW, this board has been running for six months on a Deer 300 max watt PS. I hear that Deer is not a good PS to own, even though I have two work fine and keep my 5 volt rail at an even 5 volts...