I've heard the 3B-ST many times in a friend's system and owned a DNA-1 before. The 3B-ST's midrange and highs will sound a bit more open, bass will be tighter and well-defined. DNA-1 will have the smoother highs and more liquid, dimensional midrange. 3B-ST's bass will be on the full side, not unlike that of a tube amp. The DNA-1 is slightly more musical. If you think your B&W is on the aggressive side and want to tame it a bit, take the DNA-1. If you want your B&W to sound 'alive' and kick butt, the 3B-ST might do the job. I'd say they're even with regard to throwing a soundstage of generous proportions. System matching is the key, as always. Good luck.
