Here are a few HTIB choices with wireless rear speakers
http://www.crutchfield.com/S-QnScXHyJz9h/cgi-bin/prodview.asp?i=113HTBS610&g=37600&search=wireless+rear
http://www.crutchfield.com/S-QnScXHyJz9h/cgi-bin/ProdView.asp?g=37700&I=158DAVFR10&search=wireless+rear