I have put together computers with PC Chips boards in the past. Their boards were slow, unstable, and were a complete headache to set up. They came with lousy driver support - ex. one model the network drivers included on the cd was missing some installation files needed to set it up, it was a known error even listed on the mb faq on their website, yet their file downloads seriously were like .02KB/sec. The boards were buggy as all hell, as one I remember worked fine at 100MHz x 4.5, while a second one had to be set up at 95MHz x 4.5, because 100MHz x 4.5, or 90MHz x 5 would lock up Windows startup. Windows experienced seemingly random lockups, I remember I couldn't install HP printer drivers for the life of me with a fresh install of 98.
On top of all that, these PC Chips boards are notoriously slooooooooooow. They will not give you the full potential of your CPU, and they do strangly continuely slow down with age, even with fresh installs of the OS. Search for reviews of PC Chips boards on the internet, you will find other comments just like mine.
What I say is out of personal experience, not something I heard second hand - I will never buy PC Chips motherboards and I will always advise people against them.
To try and help you out finding a motherboard, there are more and more being made with onboard sound and LAN, using SIS's chipset for AMD processors, I know ECS has a motherboard coming out, their K7S5A, that's just one board for starters. You can find modems for $15 or less, and you can find good ATI agp cards for $25 (which are a hell of a lot better that the onboard video built into PC Chips boards).
Saving a couple dollars is not worth the headaches that accompagny cheap hardware, and that's the bottom line.