First, I am a believer that one should fix their sights on a pair of spekaers they love and then get the amp to properly match and drive those speakers.
Unfortunately, you are doing it the other way as you already have the amp.
If your heart is set on B&W, thats OK. The good news is you have a full set of pre-outs on your SR6006 allowing you to add an external power amp to drive whatever pair of speakers you end up getting. A separate amp with a solid 100 wpc of high current power should get the job done with about 90% of the speakers out there, regardless of impedence. A decent amp will cost about $800-$900 new and used for alot less.
So go out and listen to speakers and decide which one sounds best to you. Then drive it with your Marantz and see how they perform. If the Marantz doesn't make them sing to your satisfaction, you have the comfort of knowing you can seamlessly add a power amp to your system.
Unfortunately, you are doing it the other way as you already have the amp.
If your heart is set on B&W, thats OK. The good news is you have a full set of pre-outs on your SR6006 allowing you to add an external power amp to drive whatever pair of speakers you end up getting. A separate amp with a solid 100 wpc of high current power should get the job done with about 90% of the speakers out there, regardless of impedence. A decent amp will cost about $800-$900 new and used for alot less.
So go out and listen to speakers and decide which one sounds best to you. Then drive it with your Marantz and see how they perform. If the Marantz doesn't make them sing to your satisfaction, you have the comfort of knowing you can seamlessly add a power amp to your system.