ECS has a motherboard out and it supports everything the big players due, only it has an SIS 375 Chipset and costs around $63 including shipping! You ight want to take a look at it as it seems to have only two weaknesses A) it doesn't overclock easily and B) it likes high qualtiy Powersupplyies with 350-400 Watts. If you haven't picked out a case yet, I would recommend the <A HREF="http://www.antec-inc.com/product/cases/wkstion.html" target="_new">Antec SX840 </A>. It has plenty of space, lots of cooling power and a 400 Watt AMD approved powersupply.
If it works for you then don't fix it.