The Delta 38 cfm isn't loud, IF you live right next to a freeway that's very busy 24/7/365. If you have the good fortune to reside in a quieter neighborhood, the Delta is a L O U D room mate. Oops, I meant house mate, uhh neighbor. If you can keep your PC in the next county, you'll be OK.
The trouble is, there's no other 60mm fan that compares to it. Perhaps a ducted 80mm might equal it's cooling power. If that were true, how come I've never seen one? It's about time!