I have had an KT7A and recently exchanged it for a A7V133 (ASUS). Don't misread this as KT7A being bad. On contrary, I really miss the tweakabiltiy of the KT7A. The problem with the KT7A (non-raid, at least) is that it has some issues with having SBLive and DVD/CDR drives on the second IDE channel. There were ways around the problem, but all of them requiring some sacrifice of sort (disable DMA/install Miniport=>higher CPU usage).
To refrain my my rambling, I think KT7A is an awesome board. Given a few more bios fixes, this will be a GREAT board if you are a tweak fan. The ASUS I have now is great, too. It has less tweaking options and seems to fall slightly short of my old KT7A. However, this board is stable has hell. I tried to reproduce the problem I had on the KT7A and still no problem. I think ASUS is targetting towards people who wants to do some tweaking and just want a box that runs. ABIT, on the other hand, has got to be a tweaker's dream come true.