I am about to create, for myself, a computer with Athlon processor. And then perhaps one for my parents with same specs. I have a choice here and cannot decide what to do.

There are two motherboards that look to suit me. I plan for an Athlon Thunderbird 1.3GHz processor. My two motherboard choices are as follows:
Asus A7A266
Asus A7M266

Money is, for this small a difference, no matter. They both suit the needs of this young engineer quite well (as far as I am to know, that is). And they both are available to me.

Perchance, if there are any thoughts, comments, suggestions for which I should choose I would be most obliged. I do not have the money now but would like to begin ordering for my system quite soon.

Thank ye, good sirs. And adieu.