"I also have a bizarre issue with the third note in the PRV not sounding, and yet a copy/paste of that data played normally."
That could be the old buffer size issue. You need to go and manually make it bigger. IIRC, the default size was increased some versions back, but nearly everybody stumbles over this one first time.
I agree the midi implementation, whilst improved, is problematic in many respects. Cakewalk 4 for DOS kinda set the tone for me. I came from Voyetra which was fluid by comparison (but unstable). In my next midi-driven project, I'll make a list and post it in the suggestions forum.
Thanks for the heads-up on FL, I will definitely give it a closer look.
I agree with Craig Anderton, use the DAWs that give you what you need.
Audio recording, as you say, is Sonar's strongest suit. It is a huge grab-bag of some amazingly powerful tools covering totally different styles of music and working, just waiting to be discovered (but see the recent Cave Man thread).