I recently bought a benelli nova and I was wondering which kind of choke tube to buy. I really don't want to just go out and buy one without knowing about it. I know you can't tell me exactly which one to buy but I'm sure you can give me an idea. I'd like to not spent more than about $30. My friend has an undertaker choke and he says it's real good. I'll be shooting 3 1/2 in. 4's if it matters.