I have 2 VP150 and it is better for music and also for movies, but not because the VP150 has trouble keeping. It is just a "vertical spatial" thingy.
Making sure they don't interfere with each other (cross-firing) is the main thing (I made the mistake of angling one up and one down and it took me two good days to find out what was wrong with the sound). Now I have the bottom one straight and the top one barely firing downward and the sound stage is perfect.
If I could have 1 VP150 directly accross the screen, I would probably never have felt the need for a second one. But as I was waiting for my replacement A1400 and not wanting to push my 805 too far with a 3Ohm load, I expiremented with the difference between top and bottom. I slightly preferred top, but both gave me a slightly skewed instrument positionning (one too high, the other too low). Now it's great!
Okay. That was my 2 cents on dual center!
