I use MSI and they've been very good to me. You can try this one
[MSI 645 Ultra (MS-6547 6547-010) P4 DDR 333 400MHz FSB SOCKET 478 ATX MOTHERBOARD]
Newegg has it for $72, sorry onboard sound is included it just seems to be that way with boards today but, you can always disable it. Look at it this way if for some reason your soundcard tanks you have a backup . Well heres the link http://www.newegg.com/app/ViewProduct.asp?submit=BROWSE&manufactory=1312
Its the only one on the list for $72.