Any good 200mm ball bearing fans for horizontal use on case top?

I have a Coolermaster megaflow 200mm fan mounted to the top exhaust area of my case. Because its a sleeve bearing fan it has started making noise only after about 2 months.

I read that ball bearing fans are much better for horizontal mounting so i want to replace the current fan with one. After searching on newegg i could only find 1 fan like this, the antec big boy 200. It is out of stock and is rated at 30db whereas my current fan is rated at 19db. I would like to keep it quiet, around the same dbs as my current fan and flow around 100cfm.

Any suggestions on a fan like that?
 


If your computer case has the mounting points for 120mm fans then it should do the job nicely.