NB, RAM, and GPU waterblock design

[Natedog]

I currently have a waterchiller(fridge) with water at -18C and two aqua via 1300 (370gph) pumps. My plan is to run the CPU and NB off one pump with 5/8"barbs(1/2"ID) and 1/2"ID tubbing, and use the other pump(3/8"ID tubing/barbs) to cool the GPU(Radeon 9700), gpu memory and the system memory(XMS3200C2).

As for the designs that I have come up with so far I was planning on using an offset of Volenti's direct die block(little nozzles shooting water at a high velocity onto the core) to cool the CPU and GPU. The direct die blocks are made to be high velocity, low flow. As for the NB, gpu ram and system ram I am not completely sure what I should go with. I was thinking of making them simular to the pin-grid-array/dimple blocks that would create turbulence even at low flow.