As a Piega C3 Limited owner, I can relate to your experience. In fact, I also own the Scott Nixon DAC. Both are amazing products, and honestly for the money, I am not sure the Piegas can be beaten. And I have only heard one DAC in my life I liked better than Nixon's regardless of price. Although it was $6,500. ;-)
Mystang, to try and answer your question, I believe that any of the C Limited series have a life-sized soundstage, but the 8's and 10's have possibly an even higher than life one that sort of brings the entire room into your listening space. My 3's are a bit more intimate, and this is probably due to the size of my room versus the rooms I've heard the big boys in.
Nevertheless, I've never, ever experienced the miniature soundstage you describe with any gear hooked to my 3's. that includes probably 2 dozen amps, and a dozen preamps.
In short, I am a Piega Limited zealot, and I don't think you'd get that type of soundstage with them.
They are the most neutral speaker I've heard that still maintains emotion, and beauty. Of course, the Wisdom M75 is pretty good at that too, but it's also 8 feet tall and $75k.
Grats on the purchase Brent!