<< Basically im making an emulation machine so the cards need to be cheap and low profile because they would be going into a desktpo rather than a tower >>
My roomates and I did this last year. We had a Celeron 400, 256 MB Ram, & an old ATI Xpert98 card (8meg PCI). Everything else was built in. It had been my parent's old comp. Hooked the sound up to our stereo, and hooked the comp up to our LAN. Grabbed a couple of cheap USB gamepads, and we could play NES, SNES, Genesis, MAME, GB, etc. Games looked just as good as the originals. Also used it as an MP3 jukebox. BTW, I suggest you set up the OS with large icons and use an extra-large appearance scheme in the display settings. That helps alot.