You wanna get a dremel and an Antec 3700 BQE!
I would go for a server cube as they look very nice but as im at uni i have to transport my pc all the time so ive picked the smallest case that'd do the job as nicely as possible. And look good and perform very well.
Watercooling is undoubtedly the king of performance / noise. The 2 120mm fans you see in my setup are on 5v. Not only do i get VERY good temps, but theyre so good, ive decided to overclock my processor too... and its overclocked ALOT as well. Currently its running 40 Deg C FULL load sitting on the floor against the wall which isnt the most ideal place for airflow but you get the idea (watercooling rox - for those of you who didnt get the hint).
Ive done a few mods since ive took those pictures like cutting the fan grills out. Ive got a few mods on my todo list too like re-tube the whole system. And build a special shroud to go on the front bottom of the case. Mount the pump.
To fit the radiator/fan where it is ive had to cut the hard drive cage out which i planned to do before i even ordered the case. I put my hard drives in the 5 1/2" bays, theyre elastically suspended there.