to start off, yeah that boards really old, i wouldnt bother puttin too much into it.
i built a new system couple months ago, and i used this http://www.amazon.com/gp/product/B00..._ya_oh_product
for my MoBo. great performer, plenty of extra's, and at about $230 you really do get alot of board for the money. used a i7-920 proc, 6gb corsair dominator and threw it in a Cooler Master HAF full tower. easiest build i have ever done... ever! and ive built quite a few machines.
i also put two geforce gtx260 core 216's in SLI. and couple months later, the only problems i seem to be having are the beta 64-bit video drivers with basically open beta OS (windows 7 RC 64-bit). super fast and rips through everything. i did a benchmark with HL2 at 1920x1200 all video settings at max and averaged 160+ frames per second.
little pricy i know, but i take my computers seriously heh. hope it helps ya in any way.