Thoughts on adding a GPU loop?

[redstars]

I haven't fiddled with my current setup in over a year, and I want to add something new! I am still satisfied with my ram, gpus, cpu, mb, etc... (at least in light of the current upgrades available), so nothing new to add there. I'd like to hear your thoughts on the addition of a top mounted radiator to cool my current dual core and future quad cpu.

Here's my current setup:

You can see a hole cut in the top that could fit a radiator bracket. Honestly after looking at it again, I could probably live without this addition. Any ideas for future projects?

 

[Zefram0911]

I've got a dual loop... CPU and northbridge for loop 1. Sli video cards in loop 2. Probably overkill with my Thermochill PA120.3s though. I have a huge case though.