quackkiller has the best advice. blow a bunch..buy what you like (or in my case...what you like AND can afford.)
if i may toss my 2 cents in however, here would be my top 2.
RNT short barrel. either Cocobola or Bois D'Arc cost is around 75 bucks.
Sonderman 66. this is a remake of the old Olt 66. easy to blow, nasty, raspy, soft, loud when you want it to be, it really does it all and does it well. cost is around 27-30 bucks. i ordered mine online. DJ illinois River Calls i think it was called. type in Olt 66 or Sonderman 66 into a search engine and the site will come up.
Friends Don't Let Friends Shoot Mossbergs.