DeVore O/93 or PureAudioProject Duet15 for a First Watt SIT-3?

The room is 19‘x12’ and 16' high (part is 8' hight).
There are bookshelves, a big sofa, an armchair and a carpet on wood floor.
Speakers have 5‘-6’ behind.
The listening armchair is 8‘ from the speakers (behind me I have 10’ to the back wall).

For me it is really important to have a warm sound, a wide and deep stage even at low volume.
The Avalon Indra are great, but they sound best at medium-high volume.

I have went through everything you are considering, in the end I went with Volti Audio, talking to Nelson Pass, tons of emails I went with the Sit-4 and I am so glad I did…what ever speaker you get consider the Sit-4. I have been using it since July this year and it really warmed up my system without losing any detail…one good thing about the Pass gear it’s solid and never a problem…it]f this tells you anything I sold all my tube gear and tubes…the Sit-4 is 10 watts of Class A that drives these Volti Horn speakers to a beautiful sound…

I have 2 friends which owned both the O/93 and O/96 DeVores. They replaced them both with speakers which conform more to the current standards of design. First order crossovers, narrow baffles, more inert cabinet construction, etc. It didnt take them long after getting the new speakers to discern exactly how much these DeVores actually missed or got completely wrong. 

+1Glennewdick

I own the SiT3 and Caladan open baffle speakers. This is a wonderful pairing with all the sonic attributes you look for, as long as the room is big enough. I bought the Caladan’s for a 14x15x8 listening room. With room treatments, a near field listening position and multiple amp/preamp combos they sound good but not great. I don’t want near field.   In my larger room 28x20x8 at 5-6 feet from the back and side walls the OB’s are magical. I already have Volti Rivals in the big room, which are also magical, so now I have a first world dilemma.

I have 2 friends which owned both the O/93 and O/96 DeVores. They replaced them both with speakers which conform more to the current standards of design. First order crossovers, narrow baffles, more inert cabinet construction, etc. It didnt take them long after getting the new speakers to discern exactly how much these DeVores actually missed or got completely wrong. 

Before I get to the heart of your post, let's get something straight; it is "DeVORE Fidelity" if referring to the company and John Devore if referring to the person, but there is no "DeVore". But that is a minor thing. 

As to the gist of your post, I happen to own both Devore O/93's and narrow baffle speakers with inert cabinets. "Current standards of design"? Who's standard are you referring to? My O/93's in my room and in my system far-outshine my other set of loudspeakers. No contest. They run circles around them. The other set are Spendor D7.2's which admittedly don't have, to my knowledge, first order crossovers. 

What sets the O/93's apart is more than truth to tone and timbre-those large baffles project a certain sense of physicality and body that are completely missing in the narrow baffled speakers. 

It all boils down to the non-debatable truth that all loudspeaker designs, regardless of price, present compromises. No one loudspeaker can do everything. There is a certain "blemished midrange" with the O/93's that can be heard at times and they are not imaging/soundstage champions. But they are imminently satisfying to those of us who listen for certain things. 

When so many widely respected reviewers have Devore O/93's or 96's and when so few appear on the used market, that has to tell you something. 

And last, for now, there are advantages to high sensitivity easy-load loudspeakers and wide baffled loudspeakers are much more suited to those design characteristics. 

Nope, one more thing. Any post that starts with "I have a friend" or "I have two friends" should immediately alert the rest of us that some disinformation/confusion/distortion is about to follow.