I have to make the obligatory 'lol liquid cooling' post.
And the obligatory 'my CPU cost half as much as yours and runs 4.2GHz - on air 
'.
PS: Put another GTX 460 in there - two 460s are faster than one 480, and cost ≤ it.
The LOL is on you (AGAIN). Liquid Cooling is a proven method that works. If you are going to OC and retain chip life liquid cooling is by far your best safety net.
Yes, the LOL is on me (AGAIN) because you can say incredibly stupid things.
So invest in a system that generally costs as much as a new CPU to
maybe "retain chip life" (not like you can actually prove that there's a statistically significant advantage, since you just made that up), even though CPUs are designed to run perfectly fine on air in the first place. Temp is temp. Under full load my 4.2 GHz quad-core barely hits the mid-60s. If you're curious it's being cooled by an NH-U12P.
But of course let's ignore the fact that a liquid cooling system requires infinitely more maintenance than my air-cooled system (which requires exactly none) and is far more prone to failure. So yes, pay hundreds of dollars for a system that requires periodic work, makes more noise, is prone to failure, and worst-case-scenario will destroy your entire computer. On the plus side, your CPU
might fail after six years instead of only five! You know, even though I could buy a new CPU for the cost of your water-cooling system, and I've never even heard of a well-cooled overclocked CPU dying because it 'wasn't on water'. Probably because you made that up to (presumably) justify your own uneducated, moronic purchasing decisions.
also LC systems tend to be more quite then air cooled
Water cooled systems are still cooled by radiators which have fans on them, as well as pumps. If anything they'll be noisier because unlike a CPU heatsink solution they're OUTSIDE the case and are rarely load-throttled. Fanless water cooling towers exist if you don't mind something the size of a small child taking up space.
The loudest part of my computer is the GPU fans and the Raptor HDD - but seeing as how a single water block for a GTX460 costs about $120, it's a small price to pay (two water blocks... or tri-SLI... hmmm). Furthermore, you still need fans in your case even with water cooling - my CPU fan blows air across the tangs of my RAM heat spreaders which keeps them cool too. Without the CPU fan they'd be running much hotter (which, in a twist of irony, completely flips around on Wolf's argument about chip life). And unless your case looks like a tentacle monster attacked it and you invest HUNDREDS of dollars, you still have to keep your NB, SB, PSU cool and while I'm skeptical about how much it affects them, hard drives.
