Watt Puppy that much of an improvement?

Long time lurker/learner here with a question perhaps some of you guys can weigh in on. My set up is Pass X250, Pass X1 pre, ML No 37, ML 360S DAC along with B&W 802S3 on SA's. Good interconnects with Purist Venustus spkr cables. Anyway, I've been reading with interest about the watt puppies and started thinking....if I purchase used, I could probably swing a set wp6, wp7. All things being equal, will the resolution, soundstage and depth be that much better than with my B&W's? That darned upgrade bug is still fly'n around and if the more experienced here says there is......I'm going to start looking more seriously and try to find a set to audition. Thanks.....Mark