Let me preface this with the fact that I am NOT an audiophile, but I do understand it. I have a system consisting of a Panasonic 50' plasma, PS3,Xbox 360,Digital HD DVR cable box, and a Denon AVR-1705/685 reciever with a JBL scs300.7 7.1 channel speaker setup. That has a 10" 150 watt subwoofer and I am also running an old Paradigm 100w 10" sub in the rear of my small front room (14x16ish) . I have two subs because I like it as my music tastes lean towards the loud and obnoxious. I know it's not a Ferrari priced system, but I have a total of $450 wrapped up into it, and it sounds nice. One last thing I run it in a 5.1 digital config. Well I like shows like Sons of Anarchy and the low grumbly voices are not coming through correctly because of the small speakers.Same with the punk music I listen to, the poorly recorded vocals and guitars don't shine through. Even with great sounding remastered Pink Floyd, the guitar and bass are not quite up to par. Sooooo I obtained some Polk Monitor 60 speakers, again not top of the line or even mid, but for me they sound great, I have them in my garage hooked to my old pioneer receiver and they sound decent and they look alot nicer than the other old floorstanding speakers I have laying around like my old Cerwins and kenwoods. So long story well, LONG, how can I integrate these into my current home theater without the little JBL center channel being replaced? Now I will give it a shot no matter what the answers are but I would however like a painless way of doing this. I just don't want to replace the center, and I wont be investing in anything besides maybe speaker cable. So can I replace the L/R JBLs with these Polks for better sound? Thanks in advance!