I keep reading reviews as late as September of last year, which quote the B&W 702 S2 floor standing pair at $4,500. Everywhere I look, I see them for 6k/pair. Where are they $4,500/pair? I also see the signature series quoted at $6,500/pair, but I only see them for $7,500/pair. Was there an upgrade made on the floor standers or is this inflation? Even the B&W website says they are 6k/pair.