An issue I forgot to mention is that going build-your-own costs too much time - let's just say with an extra hour's worth of effort to track down components etc I would have lost the cost benefit about ten times over. I just wanted a system that would allow me to go (a) v. quiet and (b) that was IN BALANCE with the rest of my system (and would remain so over the next year or two). There is zero point in having any lower temps than I do now, system-wide - given that I the cooling is not my bottleneck any more, nor is it likely to be in the near to mid future, I am happy.
The radiator is actually fine - sure it looks a bit industrial, but with the internal rifling on the tubes increasing turbulence I guess heat transfer is good - which is what a radiator is for after all. And in terms of impeding flow with lots of bends - yeah, sure it does so, but not enough to mean the system falls over, or even remotely near this. And it fits in the space I've given it quite well, which is important
I'm rather rusty on my fluid mechanics (think I've still got a copy of Massey floating around somewhere though...) and heat transfer - hey, it's been a long while and I've gone over to the dark side of finance since my engineering masters. I'll go look up Bill Adams' work though - sounds quite interesting.
Actually one thing I couldn't ever find proper empirical data on was the heat transfer properties of a water/solid interface as you increased the pressure... so if anything was BS this might have been...
The "science" of PC watercooling is nothing like that yet - I have never actually seen any intelligent, well-informed writing on the subject, and there is very little on the net regarding the academic side of non-PC fluid heat-transfer systems (after all, it's only a mechanism to move heat from one place to another in the end...).
Gnep