How different between B&W 804s & B&W 805s????

I have 805s's and originally ran them with a marantz sr8001 untill i put the money together for the MA6900. That was a huge jump for me and by far the equiment upgrade that stands out in my memory as having the largest effect. My marantz AVR has nice bells and whistles for home theater but just didnt do it for 2 channel. I continue to struggle with the pros and cons of either trying to integrate a sub vs full range speakers but I echo the others who suggest that your weak link might be amplification. (Mine was anyway...)
I have since moved on to seperates but still remember that MA6900 fondly. I hope that you enjoy yours as much as I did mine.
On the cable front, I tried about 6 or 10 different choices from the cable company in the US. My fav's for the ma6900 / 805s combo were Purist Audio Design.
Good Luck!

Related to the question discussed here.. would there be some guidance on what would be the good components to match with either 803S or 804S. I am not certain what to buy - I have zeroed on the following two options -

1. Classe System - Integrated Amp (CAP 2100), CD Player (CDP102)

2. Linn System - Pre Amp (Akurate Kontrol), Amp (Akurate 2200), CD Player (Akuate CD)

Please advise if I am completely missing the picture here by not looking at best in class components to powere and source these speakers or are the above options good. Also, if you would advise one more than the other?

Thanks

One's bad, the other worse.

I previously owned the 804S before upgrading to the 803D. Unfortunately I haven't directly compared them to the 805S, so cannot comment on 804S vs 805S.
But I do want to comment on the 804S and 803D given some of the posts above.
The 804S is a very open (definitely not congested or boxy) high definition loudspeaker that remains composed at surprisingly high volumes. While it performed well on modest Marantz gear (SR9300, PS17SA, SM17SA), the overall tonal balance was a light in my large open plan lounge.
The 803D is all round improvement (midrange a bit more laid back than the 804S), but much better bass and tonal balance. And contrary to a post above, the driver integration is superb and noticeably better than the 804S which was not bad. Surprisingly the 803D is not as demanding on amplification as the 804S, but does responds to every improvement up the chain.
I did try the 804S in a small room (3m x 3.5m) where the bass tonal balance was good, if not earth moving.
My suggestion is to compare the 804S to 803S to 805S+subwoofer with your preferred amplification before making a decision.
BTW, the Marantz PM14Mk2 is a great amp and will drive the 804S or 803S/D fine.

Thanks.. in the meantime I had a chance to compare 803s and 804s and I am sold out on 803S. The question remains on compatible electronics with the speakers that supply good power - I am going to try Marantz and Macintosh equipment over the weekend based on the suggestion. Hopefully I move closer to making a decision.

Cheers!