What you see pictured in stacker cases are called "4 in 3" hard disk racks which can hold up to four 3.5" drives in three 5" bays. I don't know how else you'd mount other fans in there other than by modding the 5" bay cover plates if present. The CM fans are actually nice for HD cooling - and pretty quiet too but don't push much air. I have the one I took off my "4 in 3" rack for sale - click the link in my sig.
I'm using one of the Sanyo Denki fans I also had for sale on it now as I wanted it to also help with general system cooling. Those are some of the best equipment fans you can buy, period! But like the standard CM fan, it has no bling. Too bad mine are all gone now - but I may try to get another carton of them - watch my listing.
Thermaltake also sells a drive rack that has an LED fan I think. And Lian Li sells a nice HD cage with a pretty good looking face on it to hide the fan plus hold a filter. My review/overview of them should show up soon in the "articles" section of
http://www.TechIMO.com
.bh.