I would advise getting two different ones if you want to do both bluegrass and frailing. The kind of tone and "punch" which makes a good bluegrass sound doesn't usually suit what makes old-timey banjo special. Obviously you can play either style on any banjo, but you wouldn't buy a Rolls Royce for driving through mud if you could swap it for a jeep.
Quack!
Geoff the Duck.