Mike, in case it helps - my plasma is on a Sanus non-tilt wall mount and distance from wall to front of tv is 5 1/2" (I just measured) The tilt option would put the TV out further.
My W150 and 22's are ~4" deep from wall to front of grill.
Also when I was deciding on my purchase I had questions on VP vs W 150's - Alan assured me they sounded 'similarly well' as I believe he terms it . Of course, call Axiom and get the expert recommendations.