Ok, trying to re-spec.
I still fancy the P35 Gigabyte board - DDR2 as well, which is fine [I don't want to go to DDR3 yet] - Gigabyte GA-EP35-DS4 iP35
http://www.ebuyer.com/product/143227
Now I was looking at the Q6600 before, but now the Q9450s are out - and am sorely tempted, for the extra few £ :chin:
http://www.overclockers.co.uk/showproduct.php?prodid=CP-202-IN&groupid=701&catid=6&subcat=793&name=Intel%20Core%202%20Quad%20Q9450%20LGA775%20'Yorkfield'%202.66GHz%2012MB-cache%20(1333FSB)%20Processor%20-%20Retail
I do want to overclock, and have seen a few people using this combo - and easily getting >3GHz stable.
So next stage - cooling - I really wanted the Ultra-120 Extreme
http://www.overclockers.co.uk/showproduct.php?prodid=HS-039-TR but think there may be compatibilty issues with the Gigabyte board; any other recommendations?
This then just leaves some decent fast memory - 8GB - 4*2GB preferred - I was initially concerned about high latency, but should I be? Will I notice much difference at that level? i.e. would two packs of this be ok?
http://www.overclockers.co.uk/showproduct.php?prodid=MY-148-CS&groupid=701&catid=8&subcat=817&name=Corsair%204GB%20DDR2%20XMS2%20Dominator%20PC2-8500C5%20TwinX%20(2x2GB)%20Supplied%20with%20Airflow%20Fan%20(TWIN2X4096-8500C5DF)
Or should I go for another make? Never really sure of Corsair, having been a Crucial fanboy in the past.
Everything else seems sorted - 1200W PSU, and initially just one ATi 3870 X2 but then will keep eye open on market, and crossfire in a bit.
Hard-drives - will have my multiple arrangement as now, with the OS on some RAID Raptors, and a few 500GB thrown in for storage, although I am sourcing a NAS drive for the network.
Will be running Vista Ultimate 64-bit as well
Ignore suppliers above - I will shop around for best deals once specced. Oh, remember I am VAT registered, giving a nice 17.5% discount AND tax relief on this build
Thoughts? Please, be abusive - but I want to start ordering soon now that this lovely shiney case is here

and with a lovely clear side case, any modding ideas welcome

flashing memory sticks :chin: