Watercooling Kit Mods
 

However, starting from scratch with good components gives the best bang for the buck - not a real surprise. If you have an entry level kit and now hunger for better performance, consider a total replacement - in the long run, it's a better approach

http://www.overclockers.com/articles1092/

In short; turn-key systems do not match up with custom assembled rig by selecting the best components from varies producers.

If I must be an extremist; I'd go Vapor Chill; W/C NB, GPU, HDD, Mosfet, memory and PSU. Did I miss anyone?

Or, buy a server chamber with A/C and humidity control; i.e. meat locker.;)