Hi Guys, I am with Rizla on this one.. adding fans, lapping and putting different TIM on a sealed loop is A OK but you really shouldn't tamper with the liquid loop for any reason other than entertainment / a fun project.
As for pretty lights and colours, we have Vantage out now w/ an RGB LCD sreen and Maestro is coming soon which will let you do RGB lighting in your whole chassis, and control all your fans.. even upload your own image to our LCD.
Cheers,
Barry @ CoolIT