building system.... brb with edit
Abit IP-35 $90
Seagate 250gb sata $66
CoolerMaster Case (shop around for free shipping one) $40
DVD Burner Sata $26
Rosewill 430w psu $30
AC Freezer 7 Pro $22
If you can spend a little more, or you can spend the $20 from the MIR on the video card ahead of time... buy a bigger/better power supply. The one I picked out was absolutly bare minimum. I wanted to make sure I could get under budget.
Also you may find a CM case for $29 free shipping a lot of places, have to shop around.