My dealer recently started carrying B&W so I had a chance to audition the 802D's about two weeks ago. They are phenomenal speakers. I can tell you they are way our of your price range (around $15K retail). I thought they did a lot of things amazingly well (imaging, bass ect), but I don't think I personally like the diamond tweeter. Sounded a bit "dry" to me. That's the best way I can explain it. I prefer the overall presentation of the Paradigm Signature S8's at less than half the cost, but again, that's just my opinion.
As mentioned earlier, I can't tell you what you should do either. At your price range, I would look into the PSB's. If you look into the used market, I think you could put together a very nice system that won't go over your stated budget. If you find something you like that is over your limit, start with the front three speakers and a good sub. You can add surrounds as funds become available.