Call me crazy, call me insane... but I like to have 2 pumps in a row.
Main issue for me is that I want the thing to be "fail safe" It's not that I'm to afraid a pump will fail. (As all pumps will fail on one day)
It's more like that when it fails, I can continue working.
Also, a power usage is an issue for me.
I'm not sure if the MD20rlzt will be that much better. It's rated for a max flow of 15l/minute, max 5m head
The MCP has a 12l/minute, max 3.25m head.
Normally if you combine the pumps, you'll get a bigger head.
Noise is an issue for me also. As far as I could read, the swiffys are more silent.
I'll be running the WhiteWater, DD-Z 875 block (13mm), and a modded Innovatec GPU block (13mm). My radiators are the BIX, the D-tec Heatercore and one 80x160x30 rad. All copper,13mm.
The Dtec and BIX go in the top of the case, as in fan-d-tek-fan-bix-fan. The other rad goes in the bottom, getting cool air from the outside. (2x 80mm fans)
The water goes first via the bay res, to pumps, to D-tek&Bix, then to the 80x160 rad. From there to the WW. The split will stay after the WW, going with separate runs through the NB and GPU, and back to the res again.
My other loop (aluminum) is 2x Eden 106 pumps (maybe in res), 3 HDD Koolance blocks, 1x home made Mosfets block for the IC7-Max3, 1x home made Southbridge block, 1x home made PSU cooling tube, 1x home made backside of mobo block, home made memory blocks(?) and one overkill 150x250x40 alu rad.
For the alu loop I'll be using silicone 4mm tubes, splitting the outlet into 6. I'll need to work out that they will be equally restricting.
First I was thinking of using a blower, but I can't find one silent enough. Running the fans at 6v, they are not noticeable. (Papst)
A bit of the setup I'm thinking about (needs to be updated):
http://members.chello.nl/l.vanderhorst1/setup.jpg
This should keep my setup nice cool

and virtually silent.
I finnished my mosfets block. Now I need to work on creating on HDD, the SB and the mobo block.