Speakers for a Large Room (20’x37’)

Open concept listening space with speakers on one short wall and kitchen at the other end.  Furniture about fifteen feet from speakers.  I assume I'll need large speakers and am considering Klipsch Cornwalls as well as Tannoy Ardens, but open to suggestions.  I also assume standmounts are too small for the space.  I should mention I mostly listen at low to moderate sound levels, occasionally cranking it if the wife is out.   Thanks for any input.