gotta build a computer for a friend, but i quit paying attention to the chipsets right when the kt400s where coming out. i remember they had some bugs and that's why i went with an epox board with a kt333 chipset.

are the kt400s doing fine now? are they the best boards out? i was thinking of going with epox again since i'm really impressed with my 8k5a2+. should i go with the 8k9a2 or 8rda?
also, what's the difference between the 8k9a1 and 8k9a2? the only thing i could tell was the integrated audio. is that it?

thanks in advance for any help