2.8c seemed better money wise.If you dont got an OS.
Find a site that offer's OEM version of XP if you buy a hard drive.
You need 2 sticks of memory for 800 FSB sweet spot for most seem'd to be 1 gb.
Since your getting a sound card liek ByteDemon id recommand a Intel board.If you choose not to get a sound card id get ether a Asus or a Abit.
Make sure your power supply is P4 capable
This is a pretty good board round up.