Abit motherboard question?

Which is best:
Abit KA7
Abit KA7-100
Abit KT7A

The Abit KT7A by far. It's a KT133A chipset Socket A mobo that will run the latest AMD Socket A T-Bird and Duron CPUs.

The Abit KA7 and KA7-100 are KX133 chipset Slot A that only run the old Athlon Classic Slot A CPUs with the slow caches.