I think the LSA 20 Statements would provide significant improvements in every aspect over your B&Ws yet retain a fairly similar overall sonic signature with more refinement. Bass goes down to 25Hz, which in itself should be a revelation. They’re being discounted here for $4500/pr by the manufacturer and include a nice pair of speaker cables in the deal, and they offer a 30-day trial period that is particular nice now. Best of luck in your search.