I also am running the Yamaha 1400 through the M60s, vp150, qs-8 but an svs 20-39 sub.

I love the vp150 but to be honest I have never heard the vp100. What I did find in my research prior to buying was that owners of the vp100 loved it, but wished they had stepped up to the 150. Every review I read by those who had heard both, prefered the 150 over 100.

My line of thinking was the same as the last post, what is another $100. This isnt a computer your buying that will be worth half as much in six months and totally out dated in three-five years. A good home theater will be a good home theater for ten-twelve years. On top of that, youre likely to move during that time and probably to a bigger and better home where the 150 will be a better choice.

Finally, as another already stated, the center speaker makes up about 70% of your sound. Its obvious where the money should go.