FWIW small speakers on stands are just as demanding as large full range systems when it comes to high quality soundstaging. As a pratical matter all you do by going small is give up LF information and reducing visual impact. The foot print won't change all that much. Whether you can fill in that lost LF information depends a lot on the LF capabilities of the mains and your choice of subs and their locations. For high quality integration its not a walk in the park!
If it is visual impact that is bothering you, personally, I'd just get some smaller high qualty floorstanders and adjust to the loss of a half octave or so of LF info. You;d likely have more coherrent sound than by trying to match small stand mounted speakers and a sub(s).
If it is visual impact that is bothering you, personally, I'd just get some smaller high qualty floorstanders and adjust to the loss of a half octave or so of LF info. You;d likely have more coherrent sound than by trying to match small stand mounted speakers and a sub(s).