Bump the board to a P35 chipset and get a decent graphicscard.
I'm running a Q9550 and 4GB DDR2-800 on a P35 board myself, and I'm not worried about having to upgrade anytime soon.
(if your concern is SH5, I'd say 9800GT or HD 4770 minimum. Next step up for Nvidia is the GTS 250, which is a rebranded 9800 GTX+. Then GTX 260 etc.)