I am in the process of switching to Studio One 3 Pro. For my workflow, it is quite good. I audition audio loops, input guitar and vocal tracks, and then write MIDI for synth and bass. After that it is a question of using "instruments" (SO term), effects, panning, etc., to obtain an acceptable mix. Studio One handles all of these quite handily. It took about three days to get the basic ideas under my fingers, but I am quite satisfied with it. Since I was never a Sonar power user, it is quite OK for my purposes as a replacement DAW.