MadDogMe:
I have (3) CD Drives because each one has its own strengths and weaknesses:
Pioneer 6X DVD = Good DVD drive and convienent slot feed mechanics but wont read all CDs and makes annoying "whine" when CDRs are used in it.
Toshiba 32X = All purpose drive. It is not the fastest drive but if a CD can be read, this drive will read it (or die trying

)
Yamaha 16x10x40x CD-RW = Newest drive. Good for burning and fast installs but does not like to read all CDs either.
All of these drives are SCSI devices so they are not cheap and I dont necessarily enjoy swapping CDs all the time when changing programs

.
As for using the Enermax fans, I bought those almost a year ago for another project and forgot about them until I was about ready to buy another fan for this project. Already had them so I used them. They should be quiet enough for my needs (considering I am still useing a 120mm Sunon 108cfm on my radiator)
Yea water would be nice, but trying to make/plumb 4-5 HDDs in a bank would get old and annoying really fast.