MoBo:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128337
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128072
Graphics: Your budget made me think of the 8800gs
XFX w/free game http://www.newegg.com/Product/Product.aspx?Item=N82E16814150295
XFX a lil cheaper http://www.newegg.com/Product/Product.aspx?Item=N82E16814150275
EVGA http://www.newegg.com/Product/Product.aspx?Item=N82E16814130332
Do you need Memory? All boards listed are DDR2, and if your PSU is real old it might not have 24 pin Mobo and 4 pin CPU connectors.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128337
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128072
Graphics: Your budget made me think of the 8800gs
XFX w/free game http://www.newegg.com/Product/Product.aspx?Item=N82E16814150295
XFX a lil cheaper http://www.newegg.com/Product/Product.aspx?Item=N82E16814150275
EVGA http://www.newegg.com/Product/Product.aspx?Item=N82E16814130332
Do you need Memory? All boards listed are DDR2, and if your PSU is real old it might not have 24 pin Mobo and 4 pin CPU connectors.