For my song catalog and style, chorus all the way. I don't like flangers...phasers are cool but I'd only use it on 2-3 tunes. Chorus I use often. But I would probably choose the Carl Martin Chorus XII, because it's a "two channel" chorus -- with switchable rates of depth and rate. I keep one side at a gentle setting that I use a lot, and the other at a wild setting that's almost like a vibrato. Works for me!