Some other well respected banjo manufacturers that haven't been mentioned include Sullivan, Nechville, Ome, and Huss & Dalton.
If you are checking out banjos with the intent of purchasing I would suggest taking a look at the classifieds on the Banjo Hangout web site (a great resource for all things banjo)
http://www.banjohangout.org/classifieds/
Lots of good deals there on used banjos. Just as in the guitar universe, buying a lightly used quality instrument gives you the best bang for your buck.