Pyramyd Air Gun Mall has a huge array of pellet guns for sale, and offers advice on what to buy.
http://www.pyramydair.com/
I just got a Evanix S10 from them. It packs a good punch and isn't much louder than the suppressed Benjamin Marauder. The Koreans did a good job on the baffle design. I have been a collecter of airguns for years:>)