It's a nice system. Although having so much ram and such a high end sceen bothers me. If I see what kinda graphics card you use. Playing games on a 19" with that card is really no problem. however, the 8600GT isnt as good as it seems. It's a 8serie, but it is still compatible to the 1950X ati card. Atleast I think it is. Someone ever mentioned that to me.

Since you need alot of video ram to process all the graphics on such a high screen a 8800serie card is a much better alternative. Might you ever get to a decent budget again. Buy a upcoming 9800 card. Becose Buying a 8800GTS (Or higher) card right now should be a waste of money since the 9800cards are gonna be out in a few months. Furthermore I have nothing to disadvice. And I really admire your 4GB's of ram.

EDIT: NOTE: If your gonna buy a 9800card in the future. Youd better upgrade your psu. Im not quite sure if the 9800Cards will run at more watts or less. Probably more since most newer cards need more wattage.