I'm an owner of a new iMac and will soon be getting Logic Studio as well. So far of the research I've done, both the One and Duet seem like great products for a great price. I'm mainly interested in recording as a singer/song writer and record with some other guys in a band. ( I also heard they help a great deal with live performances). Which should I get? Usually we do either covers of classic and contemporary rock as well as some of our own written stuff. For instruments it's basically one or two electric guitars, or acoustics depending on the song, drums, bass, synth keyboard, and probably not more then 2 on vocals.