Never owned one, never had a reason to. I know nothing about 'em. But now I am working on some jazz tunes at home need to lay down quick rhythm tracks for playing jazz melodies and improvization. I am using a cassette-based portastudio, but there is obviously no way to lay down a quick track and loop it. What the hell do I buy? - Loop Station? - DigiTech JamMan - Boomerang? - Line 6 Guitar Port? - Something else? It's gotta be practical, and dare I say, somehow reasonable affordable??