If you look at the specs of most floor standing/full range speakers of generally the vast majority of manufacturers out there, what you will find is these models will have a higher SPL rating , i.e. it will take less power to drive them at a similar volume level as compared to a bookshelf, smaller design. Such is the case with the VP180.

I am afraid though, once you get used to a speaker of this size, frequency range and power handling capability, you will be tempted to go the full range floor standing (M60s/M80s)route. Whether its movies or music, it just seems to happen that way.