Originally posted by: Scoop
Dude, those specifications are given by the manufacturers. You can never, and that is a definitive never, trust them. Are you going to run them at full speed or limit them to the slowest operational speed?
Take a look at this 80mm fan roundup to see the real specs and pick one that pleases you.
http://www.silentpcreview.com/article689-page1.html
I'm not a fan of 80mm case fans as they don't provide enough CFM with acceptable sound levels. But if it's your only choice and want a recommendation, I'd say the Nexus REAL SILENT CASE FAN SP802512L-03. Newegg doesn't seem to have any Nexus fans however so you'd have to look elsewhere.