I don't recall ever actually trying the VP150 and VP180 together. I was simply commenting on the sensitivty/reistance issue and the fact that the 150 is nearly equal to the 180 in that respect making it possible to run them together. Whether or not this combo would sound as good/better than a single VP180 is still up for debate.
As Bruno said the only thing I had a problem with was trying to equalize the output between the M2 and VP180 as the M2 is a few db quieter. I chose the M2 to try to run with the VP180 as I really liked the better dispersion it offers over the horizontal designs, which would help with SQ in an off axis seat I have in my room. I couldn't run them this way as I couldn't adjust the levels.
