Well I am not sure if you are coming back here, but just a couple of questions...what is the primary reasons you are using the recording software?...I am using PA9 and learning a whole lot, maybe then I will upgade...
One of requirements that I need is to be able to print out the music I compose -musical notation, I know I don't have PA9 set up correctly for musical notation or there again maybe I do, but the last time I looked every note was on the Treble clef...hmmm well that could be challanging to hand that off to somebody to play...
I have never use DOP but maybe there are some features that are available in DOP that is not in PA9 that your buddy is looking at needing...