Speaker size and soundstage

I think people have different definitions of soundstage.  IMO, it means a speaker's ability to portray the musicians in the places they were put in the recording so instruments can be identified by location.  Just know that few recordings have natural instrument placement and most are placed by the engineer through the use of panpots, or however it's done now.  But I think many people use soundstage to mean the physical size of the instruments.  I've never liked the Wilson Watt/Puppy because it always sounded like it made everything sound unnaturally big.  But their success in the market place certainly proves Wilson knew their target audience. But in the end, as with all things in audio, everything matters - the speakers, the rest of the equipment, the room, the recording and - most of all, your personal preference.  As far as bass response goes, IMO it depends on the room/speaker interface.  I'm getting better bass response with little Harbeth P3s in my room than I did with the much larger M30s.  Just the way the speaker works with the room.  

Thanks for the input all! Such an interesting journey to find the perfect speaker match with my room (can’t change), my gear, and listening preferences.

I just moved the Dyns further away from the wall, reduced toe in, and moved closer to the listening position. Definitely improved the sound stage. 
I guess for me, I look for a wide sound stage that fills the room and makes the speakers disappear. When the Dyns were further back the sound stage was definitely narrower and felt cut off at vertically—like the music just stopped at a certain height. I felt the need to keep increasing the volume to fill the room. The Tektons on the other hand fill the room and disappear at moderate volume.

Makes me think the Dyns are just not matched with the room and the listening configuration and electronics because they sounded brilliant in the store.

In my many years of audio, I have found that in a domestic living environment, the speaker/room interface is a total crapshoot.  I'm talking about rooms where you have limited placement options, seating options and furniture-moving options.  I have never found a correlation between speaker size and how they worked in my room.  Some did and some didn't. But you should experiment within the parameters you have.  Moving a speaker a few inches closer or further from the back wall can have a big effect on the sound.  

Electronics also play a part. I found that my Revel speakers had a wider sounstage with an Arcam amp, than with a comparable Cambridge Audio amp. 

Overall size of the soundstage, specificity/precision of the soundstage, dimensionality of the soundstage, scale of the soundstage are, in my experience, distinct and dependent on multiple variables including electronics, isolation, noise, room, speakers, etc.  The only one I’ve found to correlate with size of the speakers/drivers is soundstage scale (eg. musicians and instruments sounding larger or smaller).