I have two Radio Shack Optimus Pro 77 speakers that I use as right and left front speakers that I use in my surround sound system.I would like to add a center channel speaker, but I can’t use the Radio Shack Optimus center speaker because its too high in dimension in front of the flat panel TV. Can I get a center channel speaker of a different brand that can come close in timbre of the Optimus Right and Left speakers, if so how? I really would like to have the center channel speaker if possible.