Best bet for cooling VRM is probably water.
This, or if you can, lower the voltages. If you need high voltage to maintain good OC, water cooling is the biz. Of course, the cost is pretty high. Just a decent block for a single card can be $100 and they won't work on the next card you buy (this is why I am still running a pair of GTX460s!).
Are there already decent heatsinks on the VRM chips? If you can dedicate a full air channel through the case which runs over the VRM chips or reorganise the overall airflow (so they get cold air from outside the case directly) it can also be more benificial then simply adding a fan. If they don't have a heatsink, then add one first. On some boards, they haven't all been soldered on flush, so they may not be angled flat or the same height which makes it difficult to fit a heatsink, though. In this case you can try small individual heatsinks per chip.
The Gelid will be quiet (relatively speaking), but it doesn't have the highest flow rate (about half of what the highest flow is for 70mm fans). It'll do the job if the flow path is good (getting cold air from outside the case).
For qualification reference, I have been OC'ing PC's since 486DX days and have achieved the highest score on 3DMark for my combination of hardware a while back (with a daily use setup): http://www.3dmark.com/3dm11/2773922
I see it's still the highest for a Phenom X2 and GTX460 combo :) I have since upgraded to an X6, but it doesn't OC as well as my X2.
Water is impossible..
I'm doing a Quiet PC..
I've not heard a single water pump that doesn't make a relatively high pitched rrrrrzzzzz....... sound.
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My pump is mounted on silicon dampers and is vewy, vewy quiet. In general water cooling is a LOT quieter than air, just got to find the right parts. The noisiest part of my currect system is a one of the radiator fans... gonna replace them all with a bigger, slower one soon. Here is a pic:
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The fans pull the air through the rad into the case, then it goes out the top, back and front. Got 2 loops, one for the CPU, 1 for the GPUs, the radiator also acts as a reservoir.
There are a lot of different types of pump to choose from, some are even submersed (my previous system had one of these, it was designed for a fountain).