Dynaudio vs B&W help...

Freedriver, a few reasons: I guess I just presumed the 804's would be a better speaker than a passive Dynaudio. Size, I didn't want an overly large tower. Both were available and about the same price. 

I love over the look of the 804's, and I guess I would prefer them. But, if my CXR wouldn't sufficiently run them, I'd throw the 600 XD in the mix. Then, the AVR would just just run my center and process everything. 

Another option is a Focal 1028 BE 2... ugh, so many options!!! 

I’ve owned the 804D2’s for about 3 years.  I ran them for HT and 2-channel listening, prior to building a separate HT passthru, dedicated 2-channel setup.  They are more efficient than many  Dynaudio’s, but it was not until I put the 804’s on a McIntosh MC452 that they really opened up.  I ran them with a couple different McIntosh integrated’s, prior to the MC452, and also ran them on a B&K 200.7 when I used them in my HT.  Frankly, for my personal listening tastes, I was never a fan.  For HT they were fine, but that seemed a waste to me, at the time $7500 for HT R/L.  I viewed them as an ex-girlfriend I really wanted to like, but just continually disrespected me and was happy to see them go.  

I now run Dynaudio Confidence C4’s, not quite an apples to apples comparison, but I lean towards the Dyn sound, it’s just my preference.  Ultimately, it is your money and listening preferences that drive your decision, I would throw caution to the wind and that my experience with the 802’s was that 200w was not enough power to drive them properly.  

B&W 800 series would be a poor pairing with most AVR.  In order to get the proper sound out of them you need high current amp which can double down power from 8ohm to 4ohm and ideally another double down to 2ohm.  Without going into math science, above is primary reason why @toddcowles experience great improvement when switching to Mcintosh (besides the factor that its a great amp).  I agree with other's suggestion that you'll need a dedicated power amp besides your AVR to pair with B&W 804.    To offer you my own experience, I tried using my B&W 805S with Marantz SR7011 160W AVR and I got thin bright sound with poor oomp.  This is primarily because the 800 series speakers start dropping in ohm (higher resistance) as the frequency range drops (midrange to bass), the Marantz AVR doesn't have enough current in 6-4ohm range to keep up so the result is that the higher frequency (less resistance at 8ohm and above range) stand out causing the bright sound.   Switch to a 'high current' Marantz HD AMP1 that has 35watts 8ohm and double downs to 70watts 4ohm brings the speakers to proper level of performance.  Sorry if too much technical info, bottom line, B&W 800 series speakers are current hungry and AVRs don't have enough current to drive them properly.

@auxinput Unfortunately, I never listened to them on the amps you’re referring to.  I think I may have auditioned them on a 600w Classe 2-channel and A/B’ed with the McIntosh, if my aging memory is serving me right.  But, by that point, I was a McIntosh fanboy and blinded by the blue meters. No one could tell me otherwise and this was long before I had even heard of Audiogon.