Ok, the Maze2 is a great performer (altough I bought the Swiftech MCW-462, the Maze2 has a lot of flow restriction when using 1/2" tubing).
The Eheim 1250 is a very good choice.
If I was you, I should take the AquaCoil II (less flow restriction than the Cube and perfect for 1/2" tubing).
Mine is located above the PSU. I bolted a 120mm grill to the mountings where the fan normally goes and made an aluminium shroud (0.5mm thick-anodized) of about 1" and bolted it on the other side to mount the fan (a Panaflo L1A). It's better to let the fan suck air trough the rad than blow,and it easier to mount the rad to the case.
CD
