Polk Rm6200 speaker system with a psw 10 set up in a small 12x14 spare room. Lots of bookshelves with a couch and two chairs. I have a Marantz
SR5200 reciever and over all I am fairly pleased with the system but it seem to lack a little in the middle range. I have looked at the Rm series upgrade center speakers and was wondering if others had upgraded the ceter cannel of a RM series speakers and is there a improvement in mid range coverage?