I have never played the digitech, but out of the two I would pick it anyway! I have played a Zoom 505, and I honestly think it was the worst piece of equipment I have ever owned! The sounds are cool, and it is full of features, but the on stage practicality of the Zoom is non-exsistent. If you used multiple effect settings in one song, and then performed a second song with multiple settings you wouldn't be able to program both sequences. And trying to stomp your way through all those settings and pre-fab mixes is a rediculous idea. Have you thought about looking at the POD effects? I haven't had any personal experiance with them, but I have heard nothing but good reports on them. My personal opion is save your money, and slowly build yourself a rack of stomp pedals. That way you have time to play and figure each one out by the time you are ready for the next one. Instead of getting all of the effects at once and jumping around, doing more experiment than advancement. It is your money though, spend it how you wish!