B&W 705 Signature Feedback ?

Don't concern yourself with the room size. I would also suggest listening to other speakers as I think the N805 is a more natural sounding speaker than D4. Best of luck. 

All great and well received points above. In my case, been looking to upgrade my 16 years old LSA1 bookshelf speakers , which have been superb it must be said over the years. On doing some basic research  rounds in various Youtube channels, in addition to reading online reviews from owers and pro reviewers alike, some speakers in particular have taken the lead. I began with a shortlist of Joseph Audio Pulsar (far too many on the secondary market does beg some qsts), Dali Opticon (overrrated/overpriced overall), Marten Duke 2 ( discontinued , better than the Oscar , still a contender), TAD ME1 ( kind of pricey , really cool , overall value in question), Wharfedale Elysian 1 (  quite a decent offering , soild sound delivery, careful about color choice ), ........Now for B&W, not even on my radar to begin with , all hype and no substance ?.....I was wrong , as on numerous tests , the 805 D4 in particular was on another level to the rest re: clarity , transparency , dynamics and presentation of vocals are the best I have heard in bookshelf speakers. Then by pure chance , one day I sat and listened to their sibling the 705 signature. Had to do a doubletake and check the price again , it was half the price of the 805 D4 with sound that was incredibly impressive for a speaker of it's size. Everything seelms to be there , just be careful when matching the amp to this speaker , as many have said here and elsewhere. Just yesterday , got feedback from 705 Signature owner and B&W fan for many years , advising to stay away from Rotel ???.......In his words , not the match made in Heaven both companies claim. . Instead , Accuphase, Cambridge Audio Edge A, Musical Fidelity, Luxman or Macintosh would be recommended, The Cambridge Audio Edge A and 705 Signature was in fact part of a review in one of the online audio rags, receiving quite some praise along the way. This may very well be the path to take . The QPR on the 705 Signature is quite amazing. 

I got to hear the 805 D3 vs. the Pulsar in my system and the Pulsar just did everything better. The 805s did a great job with detail and transparency and in producing very good sound, but the Pulsar equaled it in detail/transparency and far surpassed it in 3D imaging/soundstage, tonality, dynamics, disappearing act, bass depth and definition, and producing the experience of listening to a musical performance as opposed to just very good sound. That’s the best I can describe it FWIW. As far as Pulsars showing up on the used market, I wouldn’t take that too seriously as many sell them to move up to Perspectives or to go in a completely different direction. I don’t think I’ve ever read a negative word about Pulsars, which I can’t say about many speakers, and I think that says a lot more than the used market. Anyway, just some actual personal experience in case it might be helpful.  And I agree with staying away from Rotel. Both of these speakers deserve quality more along the lines of Ayre, Hegel, Parasound, Pass, Luxman, etc. to get the most out of them.

Marten Duke 2 is very revealing and requires proper amp matching. I’m not sure if the Rotel will match well. If there’s brightness or glare in the treble with the amp, the speaker will reveal it. Other speakers may not reveal the character and this may be useful for the owner as the undesirable aspects are all swept under the carpet.

The Pulsar 2 in particular is so well crafted with excellent build quality. SQ is so mellow and composed & can handle most any genre of source material without causing a fuss.

Marten Duke 2 has a glorious midrange and correctly needs proper amp selection to attain an integrated full range sound. From my listening tests, Luxman and Macintosh seem to pair well with the Duke 2. 

Already striking the Rotel amp combo with most any choice of speaker going forward. As overall SQ and not to mention build quality ( take a look at those side panels , enough said ) are quite mediocre.