Pa4x is my main all around board, but, in the meantime, am still learning both the SD40 and SK1, but forgot to mention that I tried adding my Asus Transformer netbook, loaded with Notate Composer 3, which is my notation program for SMF. I have hundreds of tunes converted from SMF to Notation format. All sound is from SD40 and it displays my full or lead score with chords, lyrics, and scrolling notation for singing and/or playing over. So now I have a neat lightweight rig of three pieces able to handle anything I need.

My Pa4x can do the same thing, but as good as it's drawbars are, it is not the SK1. I could midi the two together, but is too bulky and heavy for what I do, so both are great in their own way.