802's, to my ears = tighter bass. - I wouldn't discount them in the decision. 801's are Iconic and the model that B&W got more press on but I've found (based on my personal listening) that the 802's just had a bit more snap on the kick drums , which might not be noticeable if you're listening to most genre's but when someone's listening taste extends beyond Jazz, classical, also includes Drum and Bass ( liquid, ragga, ), 2Step UK Garage, Chicago Juke/Footwork , Pre commercialized Dubstep circa 2004-2010, then it becomes really apparent that the 802's can keep up where the 801's have a bit more "BOOM" but missed some hits on kicks and snares. Those hyper beat/hyper bass based genres aside. The 801's can do chamber music like you're sitting in the room with the players themselves. Esperanza Spaulding, Norah Jones, Aruan Ortiz, Lake Street Dive.. couldn't sound better on either model.
the other thing to consider is that YOU may have space, but if you decide to move up the ladder and go to move them along, the next person might have space and spousal approval limitations to contend with. Just a small consideration to add .