Hi GLH,
Yes, good advice from yacmed. At the side, 3 or 4 feet above seated listener's heads, and a bit forward of the listening area, to keep the QS8s out of the corner. If you don't find that the corner causes too much tonal coloration (in my room, it does), try them there.

Experimentation is the key.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)