Watercooling an QX9650

Hiya,
Im new to watercooling and I need to replace a watercooling system on a QX9650 with the aim of overclocking to the max.
Money is not really an issue, but I really have no idea of what to look for.
Does anyone have any recommendations?
TIA

In all honesty, don't bother.

I watercool all my rigs, but spending £400 or so on a high end water cooling system is pointless for a QX9650, you would be better just upgrading to a modern CPU, preferably a Sandy Bridge, which would perform better even if aircooled.

I probably should have said originally he doesnt want to do a major upgrade as it is a 3 SLI graphics card setup with Corsair 1800MHz DDR2 RAM, the motherboard and RAM alone were about £600.
The watercooling has died so ideally just want to replace that, unless a Sandy Bridge 3 SLI mobo is reasonably priced.