When I said temps, I meant lead temps.
So far, MBM gauges my temps pretty well (I'd say relatively) and they stay on those levels. I'd see if there was a 2C temp difference on the comp. Depending on the room temp of course.
I see 2C temp difference to be quite alot, given that on my air cooling my idle is 22-23C and load 45C. A 2C temp difference is 5-10% difference. The gauges aren't accurate, but I trust them to tell me if my PC is actually cooler than before. 2C reported difference should be large enough to make that much of a difference.
It is to me anyways, and since I'm blowing the money, why not?
Also, adding case fans DO reduce system temps. However, my internal ambient temp is just about the same as my room temp, adding more will not do anything. On top of that, in a watercooling system, adding more case fans shouldn't make any difference at all, since its not the air in the case thats cooling the CPU/GPU (dependent on the position of radiator/heater core).
Just for the record, I cannot add more unless I drill my own holes into the top/side of the case. I'm running 4 80mms and 2 120mms as it is. The only fan I added was the 120mm fan, and that was a high CFM fan, which I saw a rough 2-3C reduction in temps. The main difference was when I changed my PSU fans to higher CFM fans, and bypassed the fan speed control (max speed fans). PC sounds like a rocket, but its cooler than a cucumber.
May I also remind you that I'm going to do overclocking, every drop in temp matters to me. As long its not something really extreme (sub ambient cooling), I'm ready to do it. I've researched quite abit last year on TEC cooling (you can search it up), and my conclusion is that its too much of a hassle. Not to mention to make my own, I'd need a high W/cm^2 TEC, and I can't get any high enough for modern CPU heat production.
I've seen nitrogen cooling, its a great way to cool, but liquid nitrogen is just too expensive, and too dangerous to handle. Easy to procure though.
I've seen the tomshardware oil cooling, but thats just too radical.
I can't really think of any other way to really cool the CPU. Most doable is watercooling, and I'd want the best I can get.