Thermochill PA 120.3 vs 120.4

[jpe4ever]

I'm planning on replacing my 2 loops with 1 loop due to the fact i'm having problems with one of the pumps and one of the radiators keeps leaking.

I live in the UK and it's easy to get Thermochill radiators over here and i've being looking at the new 15mm spacing ones. I currently have a Q6600 (overclocked to 3.6 GHZ), HD4870 and x48 northbridge that are all in the loop. I also plan in the future on getting a second 4870. My question is would getting a PA 120.4 be overkill or would a 120.3 be sufficient?

The price difference between the 2 is only £10 and i also plan on using yate loons D12SL-12D (the 38mm size), do you think they are good to use with this rad?

[exemay]

from what i understand your wanting to put a q6600, 4870 and NB block in 1 loop? and then possibly add a second 4870 in later on?? id deffo go with a 120.4, its not overkill atall, and if at all possible go for two radiators in the loop, like a 120.2 and 120.3, or two 120.3's

its alot of heat going in that loop!