Going with the xf-48's for front L/R and the xl-23 for center.There are not any surrounds made for the Icon series, atleast not yet (are there some coming?). The xb-10's are what are on the recommended systems page for the Icon series. Would those be a better match than say RS-42's or Synergey S-3's? I'll be using for all 4 surrounds (Left, right, back left, back right). Didn't know how the icon bookshelves would make for surrounds? OR would xl-23 for surrounds sound even better??? I'm lookin' to buy Friday so any help is greatly appreciated.