Any Quaker Boy is good. Believe it or not the Little One-Sider is one of the best boxes I've heard, and it's about $15 at most stores.

My Lynch Fool-Proof is tops in my vest right now. Hard to go wrong with one of those.

A fellow I know here in KY just made me a great boatpaddle style box; last I heard he was tinkering with designs for a Lynch-style box. Could put you in touch with him if you're interested.