A loud fan isn't worth it for any sandybridge to be honest! Mine with Noctua NH-D14 and Thermalright Silver Arrow (both stock fans) is much quieter (probably better than KÜHLER box stock fans) but of course you can always swap the fans indeed!
the kuhler box, how come you guys have discontinued them now?
the kuhler box has proven to be quite a good cooler, i purchased 2 whist the offer was on to see what they were like as i have a few overclocked bundles and they are very good coolers keepting the overclock temp down to a max of 85 @ 4.7ghz and a 4.6 i7 2600k setup worth the money, how come you guys have discontinued them now?
my silver arrow is only like 9c better then that but 16.99>50.99 the kuhler will win as it does more for its money
Water cooling is the way to go
custom water cooling can be risky cos of leaking and are well too expensive. Too much of hassle of the jobs to built.