Opinions On Used Speakers music only $5K $6K

For your large room, you probably need to add a sub to get what you are looking for. Even the N802 wont put out enough bass to fill your room. I own the 800D in a room like yours.
Nick

There's a pair of mint Dunlavy SC-IVa's listed: http://cls.audiogon.com/cgi-bin/cls.pl?spkrfull&1147120084

Also, have you looked at Theil 2.4's or larger?

The N802s are good speakers. Probably the shining star in the B&W line, both from a sonic and a best-bang for the buck catagory. IMHO anyway.

Myself, I prefer the Revel Studios, (I bought them a few years ago), which if you can wait for a good deal, should show up used for around $6K.
You did not say what you're using for an amp (other than it is a Krell), but the Revel's need to have a fair bit of power. 150 wpc is the minimum I recommend. 100 wpc works, but just to a satisfactory level. 200 wpc will really bring the Revels to life. IMHO of course.
(My Revel Studios fill my 16'x24'x8' room more than adequately. Too much for my wife, but then again, she is not into listening at realistic sound levels. They have really good bass, tight, quick and clean.)

Good Luck in your search.

A used pair of Wilson Watt Puppy 3-2 at about $4000, or 5.1 at about $5500 are great speakers that will be better than the B&W N802.

Who is the kind soul that lets you audition so many different brands and purchase from the internet?

:)