An FYI regarding USHER speakers. If you are looking at a solidly built set of used speakers these fit the bill. I pulled apart a center speaker as I had a buyer only interested in the drivers. WOW, these things are really nicely built! I also have my nearly 30 year old Paradigm Phantom V3 towers (retired to act as the rear speakers in 7.1) which still look and perform as new. You CAN get really nice stuff if the owner isn't special needs and takes care of it.
