Been testing the overclocking potential of my new system now as so far it looks pretty promising, and I haven't pushed it very far yet either..
CPU E6600, overclocked to 3Ghz (from 2,4Ghz), Geforce 8800 GTS clocked to 585/1842Mhz (from 550/1760Mhz).
New results
3dMark 2001 SE: 50150 (finally broke the 50k "barrier"
)
3dMark 2006: 9568
3dMark 2005: 16187