I also have an E4300@3.1GHz, 4 GB DDR2-800 4-4-4-12, 8800 GTS 512@stock.
I built a PC for a friend last November, consisting of an E8400@stock, 2 GB DDR2-800 4-4-4-12, 4850 512@stock.
To my surprise, my rig was a little bit faster than the E8400 & 4850 in 3DMark 06, Crysis and COD4...