Well I guess the sounds may be dated but I think they are still great for a live band. I myself use an old Motif 6 classic in a classic rock band and it works fine for me. Sure I would like to update it but I really don't know if the audience could even tell the difference if I got a newer model with improved sounds.

$550 is a great price for it and I don't think you have a better choice in that price range. I think if I was you I would just go for it.