B&W 805D

Not coming anytime soon.

What are you talking about? The diamonds are about as non-fatiguing as you can get. Anyway, we tried to retrofit some diamond tweeters into the demo 805S at my dealer's shop several motnhs ago and while there were issues as the speakers are not made for the diamonds, nevertheless, the new tweeters vastly improved the performance of the speakers. When it happens it's going to be something the WAF limited are going to flock to.

What you're hearing is the front ends that are being used. The 80xD series sounds like absolute crap at my dealer (ear bleeding crap for that matter) and yet my 803D speakers sound nothing like that. The sound of the 80xD series reflects whatever you put in front of them. Essentially, if the diamond tweeter is fatiguing it's because there's an issue upstream. Source first, always.

There you go, Audioquest Sky. Silver cables, das is no goot. Stick with copper. Also, personally, not impressed by the Classe as that's what my dealer was pairing with the 80xD series.

I'd be surprised if the dealer wouldn't allow you to swap the Classe out. When I bought my first pair of N804 in NYC, I was swapping in everything including my dealer's used gear (from lines they didn't sell new) and when I bought my 804S I brought with me and used my CX-7e and AX-7e (my front end at the time) and my local dealer has nothing to do with Ayre. To my knowledge there is nothing from B&W that says a dealer can under no circumstances allow a demo with other than Classe/Rotel gear. They may be required to use them as the default demo gear but if you ask, most (all?) dealers are smart enough to want to make a sale and will do anything within reason to make it happen, particularly on speakers from US$ 8,000 on up.