[Aardil]

ok my thoughts are this:

IF all you are water cooling for is quiet operation you should be fine.

If Over clocking is your final goal, ther are a couple things that would help a bit.

Either way ( if you have room) I suggest a spacer between fan and Rad, it will help cool the water in the rad by eliminating the dead spot in the middle of the fan.

You may have to use a variable pot to raise or lower the fan speed. full 12 volts is best for cooling but noisy. Around 6 or 7 volts is usually a good trade off between noise and air flow.

Any 90 dregree fittings are bad, try to make your bends with the tubing. I see you have a couple drawn on top of your Rad, if thats the way it is made then not much you can do about it, If you are adding them try to think of a way to eliminate them.

One additional thought:
The hose leading from GPU >Pump inlet , If any way possible increase the diameter of that section hose, this will insure that the pump will have a good supply of water, It will act like a mini reservior. Since you are going 1/2 inch with the rest of the system, I suggest 3/4 hose here.

I also am assuming that the flow is :
Pump > Rad > CPU > GPU > Pump


Hope this helps
Aardil