B&W 802D3

I have them and they sound really incredible. Can’t say I regret the purchase at all. They definitely not bright and have a wonderful mid range. The reason they pop up for sale more than others is simple. They’re a big company, with a very popular, well reviewed speaker. Some people will eventually sell them. Sometimes it’s just to move up in price category. You’d be hard pressed to find a written review that’s bad. Word of mouth I’ve found is always people who have never heard them and just hear from other people, or it’s that they heard older generations. 

The D3 which use synthetic diamond tweeters are not "bright" per say because the tweeters do not have any of the breakup distortion problems that metal tweeters do.  However, they are very high resolution and very revealing.  The people who state these speakers are bright are likely people who have more forgiving soft dome tweeters in their system and use a lot of silver or silver-plated elements (such as silver-plated interconnect, silver terminations, etc.).  These elements can definitely make the D3 "too bright" because silver will tend to push hard on the upper mids and highs.

Thanks, everyone.  I am going to run this with some very big monoblocks so I should be fine on power.  I am going to spend time listening to them and other options this weekend.  Hopefully, I can classify the sound versus others and make a decision.  

Don’t listen to the Focal speakers in the same price range.  You will throw rocks at the B&Ws!

Do you own Focal Sopra 3s?  Are those the ones you are referring to?