Silly me; I forgot to make sure there was enough clearance for the rad + shroud + fan under the hdd cage. There is only about 1.5" clearance so I was concerned that the 120mm would not get proper performance. I just finished making rev 2.0:
Now the shroud is 0.5" tall and there should be proper clearance.
re how the shroud was made:
Just took a piece of sheet metal I had lying around and cut a long strip with tin snips. Then folded it to a square with one corner having a piece that overlapped and super glued it in place at the overlap. Took about 10 minutes or so.
The fan is an adjustable speed Enermax. At full speed it is around 85CFM I think.
The filling valves would all be at the back rear of the case on the outside. I think you are right though I probably will just go with the T for simplicity.