Speaking of soundstage, one 8" woofer can do it very well. It very much depends on electronics, including tubes. I had some vintage GE 12AX7 tubes in the preamp of VAC integrated when I bought it. Then I replaced them with vintage Mullard long plates. The difference was big in every element, and it wasn't really bad even with those GE. Tubes matter, a lot.
As for scale, dynamics and impact, well, that's different subject.