Given what you're looking for the Vandys are an obvious choice. I'll add the Joseph Audio Perspectives as worth a serious audition as well. IME B&Ws don't match the transparency or 3D imaging and soundstaging capabilities of either of these, but we all hear differently so YMMV. For something a little different, Nola speakers would definitely be worth exploring as well. Their designer loves pairing his speakers specifically with Audio Research electronics. Agree with others it's well worth some travel time and expense at this level. Best of luck in your search.
(p.s. You should also talk to Ric Schultz of Electronics Visionary Systems about modding your Oppo DAC -- serious return on investment)
(p.s. You should also talk to Ric Schultz of Electronics Visionary Systems about modding your Oppo DAC -- serious return on investment)