I'm interested in a looper/phrase sampler to add more fun/dimension to my practicing. I went to check out some loopers at Guitar Center this afternoon. I haven't tried them before so here's a newbie analysis. The RC-20 was kinda non-intuitive, but nice time amount. The Line6/DL4 was pretty easy to use, but is 28 seconds enough? They didn't have the Boomerang, but I'm leaning that way because it seems like it would have the best of both worlds - ease of use and lots of time. Comments, suggestions?