Thanks Philip. Not long to go
SonyCloWn
I think my build is using the old stepping of i7 as i placed my order before the D0 was listed as a configuration option. I think the Scan guys said it will overclock to 3.6 Ghz.
The Noctua NH-U12P heatsink and fan kit will be fine for these overclocks. Plus from the reviews it seems to be almost as efficent at cooling under low fan speed as it is at the high setting - and silent.