Bookshelf Speakers in Ceiling Corners?

This is for the living room, where the combination of toddler destruction and spousal negotiation has landed me here: speakers lying sideways, each on its own shelf against the front wall, about 8 inches down from the ceiling and 8 inches in from either side wall. The associated equipment is good enough, but not great: Arcam A65+ Integrated and an older NAD cdp. I only expect this to be a good mid-fi system, a setup for mostly acoustic music that sounds detailed at low-to-medium listening levels without muddy, booming bass. Ideally, I would like to pair whatever ends up in those corners with a musical sub and call it a day for $500-600. Can it be done? Thanks for your thoughts.