Hey guys. I'm wanting to upgrade my Polk Audio Monitor 60 fronts to something better. I believe ive narrowed it down to these three: Martin Logan Motion 10, Mordaunt-Short Aviano 6, and Definitive Technology BP8B. I currently have a Yamaha RX-V373 that is rated at 100x5. The room they will be going in is about 15x10 with 8 foot ceilings. They will mostly be used for movies, but i still want a great sound for music as well. I'm not located near a dealer so i cant go listen to these for myself. Just curious as to some opinions of the choices i have selected. If you have different recommendations for speakers please feel free to comment. My budget is about $400-600 for a pair. Thank you!