what do you think about this?

I was to WC my CPU, GPU, Chipset using 3/8 ID...

Now I know there's a lot of restriction so for max performance I want to use:

CPU: Swiftech MCW6000


Chipset: Swiftech MCW20


GPU: Danger Den MAZE4


Black Ice Xtreme II Dual 120mm Radiator x2


Now I want to use 1 rad for the CPU only and the other rad for the GPU and Chipset. How does this sound and should I change anything?

If you're going to be using one rad each for the cpu and gpu/chipset, respectively, you'll need two pumps to create two seperate loops, so keep that in mind. For the rads you'd be better off with '77 Bonneville HC's or Fedco 2-342's; it's generally accepted that they outperform BIX's by a good margin.

Also, unless you're planning on voltmodding the northbridge, a good silent air-cooling setup will do just as well, and will save you quite a bit of headloss in the loss of the NB block restriction and the extra tubing.

What pumps were you planning on using?

the only thing i would suggest is 1/2" tubing rather than 3/8"