Some manufacturers make like a Hybrid Bass boat. They look like a bass boat, but they have a deeper V, No Carpet, Stainless Hardware, etc. They run like a Bass Boat, but they can perform in Saltwater. They won't out perform a fiberglass Bay boat in High Seas, but they do ok.
I've personally fished out of one of the rangers, and although it's a little rougher ride then a Bay Boat, you won't find a better all-around rig for bass fishing and Saltwater.
Ranger and Triton are the only ones I know who make these, although there might be more I'm not aware of. Here's some links.
http://www.tritonboats.com/boat_detail_new.asp?bid=333
http://www.rangerboats.com/flash/gal...id=5540&gid=40