Well the only thing I was thinking, considering I already have the Zalman fan bracket installed, and hence don't need to take the motherboard out for this, would be a Zalman Reserator XT watercooling kit. I'm not however sure how good these are with quads, no real reviews of the thing out there sadly.
I've never thought too highly of water cooling.
Way too much risk for very little benefit. It's not like you're going to get temperatures hovering 5 or 6 degrees above zero...
The most you can hope for is about 10 degrees cooler than air. The average water cooler will get you temps in the high 50s to low 60s under full load for an overclocked system. You could achieve the same with a 120 Extreme on air...so why risk the water?
Water makes sense for people living in very hot climates without air conditioning...but other than that, it's highly overrated (and over-hyped).
I don't know about the IFX-14, but as far as the 120 Extreme, it can't be beat. Every review out there has shown it to be the best solution for air cooling.I already had a IFX-14 and wasn't impressed by it, and that's 120 EX performance albiet larger and more cumbersome to handle.
I don't know if you've seen this particular roundup before, but it's a good one that I refer to myself:
http://www.anandtech.com/casecooling/showdoc.aspx?i=3005&p=4
Well, there's an easy way to test that.If the Zalman 9700NT clip was stronger, I'm sure I could shave some more points off as it's not pushing down overly hard.
Turn your system on its side...and see if it makes a difference.