I ended up completely changing my setup. I now have a lian li v2000 (which is much better suited for watercooling), I changed my rad to a Thermalchill PA120.3, I also moved to a D-TEK FuZion (with a quad nozzle, and pro mount), and plan on switching to a quieter pump probably a DDC w/Petra Top. I couldn't be happier it runs much cooler now and is still very quiet.
I'm planning a new build, from scratch, later this year, and I'm tempted by a lian-li: possibly a v2100 plus II.
The only downside that I'd heard was that, because the motherboard goes in upside-down, watercooling blocks can be adversely affected, particularly the northbridge... I'm not sure that I can really see why, though.
I take it you've had no issues?
For anyone that is considering doing a setup like mine I would strongly suggest not using the p180, it is difficult to do a water setup in.
I was actually also thinking of a P182 or P190 with a triple blowhole in the top. I'm currently cooling an Athlon 64 3400+, a GeForce 6800 Ultra and a northbridge on a Reserator 1 and two nondescript 120mm case fans.
I'm hoping for a similar level of silence from a Thermochill pa120.3 and some Noctuas.
One more thing I the reason I had such bad temps in the first place was because the radiator I was using was actually not a MCR320 its was a Stealth GTS 360 Black Ice which is not well suited for Yate Loon D12SL-12 7v. So if you did the same setup and used a MCR320 you should be fine.
Unfortunately, the availability of some watercooling kit is quite poor here in France. For example, I plan to buy the PA120 next time I'm in the UK. It's Black Ice, Nexxos, or Magicool out here.
Still... I have time to think about it, it'll be a while before I can afford the rig I want. And, hopefully, by then DDR3 will be cheaper and someone will have released a clear-winner video card, that can handle Crysis.
If you still interested in seeing the setup in my v2000 I can post pictures in a few days.