I've owned two Digitech units, the original GSP 21, and the one right before the 2112 came out. It's some other number that I can't ever remember, and it's packed up right now so I can't look at it. Both are ok, and have loads of effects. Are you going to use it mainly for playing live, or recording? The Digitech units do a good enough job live, but are kinda noisy when it comes to recording. I would probably go with something else, such as the Roland unit if you are using it mainly for recording. I've seen ads for the POD pro, and it sure looks cool, but I hope they added a lot more than just a rackmount capability to it over the regular POD for the price increase I saw. If they did improve it over the regular POD I have now, then Fishmed is right, it'll be worth waiting for.