Seeking floorstander for low watt SET

Looks like you have a good list going. Of the ones you have listed I have owned Tekton, Zu Omen and Klipschorns. You can see my system page to see the ones I've kept.
I have also heard Sonist at a show and really liked them, so you might want to check those out as well.
I've never heard Devore speakers but people like those with SET.

Give a listen to the Devore O96's. They are very, very nice in performance and build quality.

Used to use a pair of Cerwin Vega's before I got my Klipsch Cornwalls. I would say that Cerwin Vega's are probably the best of so-called "mid-fi." Not sure if they are efficient enough for a low-watt SET, though. Certainly the other models on your list are a big step up in sound quality.

What is the SET amp you have? There's is a much bigger difference in drive capability between various amp and tube designs than beginners tend to realize.

Believe it or not, one man's "low watt" is another's veritable monster amp (speaking of the miliwatt SET camp)

Hmmm...You use a low watt SET to listen mainly to classic rock? Well, I guess a Zu Essence may be your best bet. 10.3 inch woofer, 97 db sensitivity. Some folks are happy with the Tektons, also with a large driver and sensitive. I'm loving my Omega MaxHemp V2s, but it has an 8 inch driver which may not be enough for you to rock out with in that size room. As a former Essence owner I will say hands down that the Omega is a much more organic and natural sounding speaker than the Zus but our listening tastes differ as I listen mainly to jazz and classical. Just a thought: if you consider changing your amp, your speaker options will open up IMHO.