Anyone else, really. It would be great to see if someone can comment that did a similar upgrade.
In the meantime, you suggested an upgrade to newer tech and I've managed to find this deal - http://www.dinopc.com/shop/pc/Intel-Core-i3-Bundle-Asus-P8H61-M-LE-Intel-Core-i3-2100-4GB-DDR3-1333Mhz-125p1102.htm
(sorry, couldn't get a neat link to work).
I can sell my current RAM, CPU and MB on Ebay for about £120 after costs so the upgrade would cost about £50.
Do you know of anywhere else that might do a better deal?