I'm thinking of picking up a basic analog delay as a Christmas gift to myself. I don't know much about delays having owned only a Boss DM-2 for a short time. I don't need any features really - just looking for the best analog delay tone. These three seem to be very popular, but my searching hasn't really shown me what the differences are between the three (besides the obvious delay time, which I don't think is that big of a deal for me). I'm leaning towards an AD-900, but not for any particular reason. Any suggestions/info to help me choose between the three? Thanks in advance!