Video track without audio option please, pretty please

I "wish" there was a piece of software, preferably Sonar, that allowed me to turn on my web cam, plug in my guitar and mic, all on separate tracks, arm them all, and record a live session.
 
Now the only option I have is to hit record on my webcam, then arm 2 tracks in Sonar and hit record, import the video, delete its audio track and line up my Sonar tracks. Ouch.
 
Why can't I just have a video track with an optional audio?