Are you planning to overclock the CPU or GPU? These are "non ohmic" devices and power consumption goes up non-linearly (and so, of course, does the heat you need to remove).
You are planing to exhaust case air through radiators? You might want to re-think that as case air is warmer than room air and will make whatever temps you end up with higher.
Are you really going to be using 12 disks? Otherwise you might think about some other cases. The next systems I put together will be based on the Chenbro "Genie"
as it has
lots of unobstructed area in the lower front - plenty for instance for a BlackIce Pro or a thermochill 120x2 (or a fedco 2-654 8.25x6.25x1).
Anyway, if you're totally set on the Stacker, yes, there are radiators designed to fit the holes for 120mm and 80mm fans. Here's
Cooltechnica's page and the numbers mean just what you'd think.
The difference between "pro" and "xtreme" is that the pro is thinner and requires less air pressure (so quieter fan) and the xtreme dumps a bit more heat. Here's the
Black Ice manufacturer's site. Do
not believe any radiator ratings there but it's useful for radiator dimensions.
I'd suggest
not trying to water cool your chipset. If you're trying to reduce noise, put a big passive heatsink on there, and if that isn't cool enough try mounting a quiet fan elsewhere in the case but aimed at this heatsink.
On to pumps. I would
guess that your radiator area (one 120x120 one 80x80) is semi-marginal for what you are cooling. You may end up with temps that are no better than air cooling. Warm enough to preclude overclocking, even.
You have to choose the pump that puts the least heat possible into your loop. Read
this thread. You will also need to choose waterblocks based on this.
My personal experience with fans and radiators is that push/pull is no better than simple pull, but that pull is often better than push. This does seem to vary based on which radiator and which fan (and how undervolted that fan is) so you may have to try it and see. I have also noticed that fans are slightly quieter if they are on the side of the radiator away from my ears (well duh...) so you may want to "push" just for that (given that you are exhausting case air).
Oh, wait - fluorescent water? OK, so the Genie is out because it doesn't look "cool" - and maybe you'd ought to get advice from someone other than me...