Swap out b&w 802 d3 for Sonus faber amati g5?

Personally I’d take Sonus Faber over B&W any day, but it really depends on what specific improvements and sound characteristics you’re looking for, and there are a lot of other great speakers in that price range as well. 

@soix

Basically looking for more musical and comfortable to listen to speaker.  I am a musician so appreciate the realism of a  Live performance.

What  other speakers are comparable?

Likely to be a huge jump in the direction you want to go. Amati are natural and musical unlike the B&W which are hot on top with accentuated bass. I have Amati… my third set of Sonus Faber speakers and B&W for my home theater. What you are indicating you want is exactly the character of Sonus Faber. I paired mine with all Audio Research gear.

The Amatis would seem to be an excellent choice depending on how they work with your upstream electronics of course.  Some others worth considering would be Joseph Audio, ProAc, Rockport, Wilson, Vandersteen, QLN, and maybe Usher although I’ve not heard their current models with the diamond tweeter.  At this level it’s very much personal taste and system matching, but hope this is somewhat useful. 

I am a massive fan of Sonus Faber speakers and have owned a bunch over the years. You may want to consider one of the many pairs of Wilson Sasha DAW’s coming into the used market. For around the same price as the new G5’s, it’s a direction even this die hard SF fan might try….

good luck…!