Ok here is the deal.... I own the HK 7300 and unfortunately years ago was talked into the Bose Accoustmas 15. Recently however, I added a polk sub and the monitor 50's to my system. The sound from the 50's is great. However, I primarily use my system for movie watching and desire the deep bass I am not receiving now. I am considering upgrading my 50's and adding a Center Channel with Polk Rears as well. Can anyone offer suggestions on a good, quality set of speakers that would work well with my HK7300? I was trying to spend no more than $1,500 total. Thanks in advance for your help!