getting a board without sound is quite the feat... you can just disable those things. Anyways, the nforce board are good, but have integrated sound(which is better than most sound cards) and possible integrated video. You can get the famous or infamous(depends who you ask)ECS board. Most likely you go for a kt266a or kt333 depending on the ddr type you want.
By the info you gave I would say a kt266 board. Look at the gigabyte board Gigabyte 7VTXH or the popular EPoX EP-8KHA+
happy hunting