<< Need exceptional stability?
As Boonesmi brought out, the KT266A is a Via chipset, but it is very mature now, since it is 4 chipsets newer than that buggy KX133. If you are really concerned with stability, go AMD 760!
IMHO, the three best 760 boards are: Abit KG7/KG7 Lite/KG7-Raid; EPoX 8K7A/8K7A+; GA 7DXR (the GA 7DX sux). The 8K7A is supposed to do like FSB 170 or more with perfect stability.
Asus boards are supposed to be rock solid, but they're not that solid when overclocked. And Asus boards seem to be low quality these days; they cut corners by taking out PCI slots, using fugly yellow PCBs, etc.
If you want stability and overclocking, those above three AMD760 boards are the best, not that KT266A isn't stable though. >>
Don't count on much OC'ing with GA-7DXR. My 1.4GHz chip OC fine and run stable at 1.53 GHz, but my mobo refuse to reboot properly unless I cold boot. Other people've had this problem too.
Otherwise its a nice board. I"d go with GA-7DXR+ though. Same thing except, you can do CPU related change in BIOS rather than jumpers.