I've got a folky acoustic song I'm working on recording and want to add a harmonica on it. Nothing fancy and it won't be the center piece of the song. It just fits really well. What's the best mic to record this with and setup? I've read a large condenser and about 3' back depending on how much of the room you want in it. Mic options are: AKG c414 XLS Shure SM7b Shure SM57 EV RE20 I'm thinking the c414 in a cardioid pattern.