Here's one option that you might consider, the Abit AI7 Springdale board. It seems to be fast and stable, and another big plus, user friendly. It also has a higher vCore if OC'ing is your thing...
the ai7 is a revised is7. it comes with GAT, which is a abit reincarnation of the i875's PAT. in tests, the is7 out performs even the asus p4c800 in some tests. so i think the ai7 is your best buy. unless you need gigabit ethernet then the extra $8 is money well spent