Thx, yeah it took me several iterations to get things how I wanted with my watercooling setup. Good radiators make a world of difference (thermochill or feser x) since they perform well with low speed fans.
I actually did have my video cards in the loop but then I upgraded cards and have been too lazy to order the new blocks.. really wish they would standardize the nvidia form factor..
Right now I just use the nv tweak utils to lower their fan speed so its not too loud, it works out alright since I don't really play games, primarily use the cards for CUDA =)
UltraMon is great buy Hydravision from ATI works great too. I have 9 desktops in total. So I just changed the wall paper of each desktop differently. I just switch according to whichever the app is on.
LordAlfa, I use an open source package called Virtual Dimension for virtual desktops. Most stable and usable one I have come across. I found many other programs had way too much fluff. If you like the way Linux uses virtual desktops then give it a try. Closest I have found for the windows environment.
Combined with Ultramon, all my window management and virtual desktop needs are met perfectly with tiny overheads.
Some people recommend you change the fluid every 6 months but I have been using water cooling gear for 4-5 years and only changed the fluid twice, haven't noticed any problems.
You can also use water or antifreeze + algae inhibitor for fish tank but IMO the nonconductive fluid is worth it. Last time I moved one of the tubes came loose in transit and I didn't test them long enough before hooking it back up, had a slow leak so not immediately noticable but the next day my motherboard was soaked. After taking everything apart, cleaning with alcohol and letting it dry out everything worked perfectly again thanks to the non-conductive fluid =)
For any more than three monitors you could maybe consider some of them wall mounted. My company just designed a control room for a chemical plant where the operators need access to 8 monitors. The ones that were used frequently were on the desk and the others were wall mounted on the wall and from the ceiling so that they could be referred to as needed.