Welcome to the forum Parkie!
Ok.. Let's clear up some of the questions first, such as KT266 and DDR. DDR is in reference to the type of memory for the motherboard. There is DDR Ram , and regular SDRAM (they are not interchangeable). Secondly is KT266, that is the chipset the motherboard uses. For a DDR solution there is AMD760, KT266, or one other that for some strange reason escapes me at the moment.
As for a good, cheap mobo, I don't know how good it is yet, but I just purchased a DFI AK76 motherboard. Got it for roughly $110, and I'll be installing it tonight (new toy just came in) to see how it goes. I'll be posting another message about the board once I get it setup and put through some torture tests..