Dear all, Have to concur with the last post concerning the Zoom 2100, it is a great unit, though I have to admit, I prefer using the Boomerang for loops, the Zoom 2100 usually gets relegated to the role of different effects and the occasional sample and hold, but that's just my $0.02 for that one. I will say that the extra $30.00 for the expression pedal is EXTREMELY worth it. As for the original post concerning whether or not you'd want to go for the Akai Headrush or the Boomerang, it really matters up to you, and what you're looking to use the looper for... In my case, I end up using the Boomerang to create multiple drones and eventually get around to soloing over top of the loops that are generated in the Boomerang. The reverse is probably the coolest "effect" on this beastie, though you have to remember that it is going to play everything in reverse that was sampled prior, and not just what you added. Have to say that in lots of ways it reminds me of my old (tape) echoplexi but is MUCH quieter. Not sure if the Headrush has this issue, but you'll really want to watch out for any line level equipment and you'll also want to take a few steps back occasionally. It (the Boomerang) has a very tiny learning curve, but that's it, the unit is really intuitive! Tchus, Lee-ohki.