The drop breech's are my favorite now as well. They are extremely easy to clean and completely sealed. The break actions hard to beat as well though.

My recommendation is the TC Omega. I just got mine for $260 from Cabela's. A good inexpensive break action is the NEF Sidekick. I haven't tested it but believe in the reviews. From whatI can tell without shooting it it's a great gun as well as the Omega.