I wouldn't recommend the slipstream for top horizontal mount. I noticed that it tends to produce rather significant vibration in such orientation.

Thus I opted for a Pabst on the top and a Sycthe slipstream on the rear exhaust.

I can attest that the SlipStream 1200 rpm model I bought has a very pronounced vibration when mounted horizontally (just what I expected from a sleeve bearing fan) even at 5v, while my Pabst syntec sleeve bearing fan even at 12v mounted horizontally doesn't approach the level of vibration the Slipst...

Hi. I've recently bought the WD GP 750 GB model, only to find to my dismay that its seeks are actually louder than the Maxtor DiamondMax 21 single platter 250GB drive I've been hitherto using. At idle it indeed is quieter than the Maxtor and the vibration is smaller, but as they are both soft mounte...