Thanks for the responses and yes - I mean Surround speakers. Sorry about that.
The room is very wide, and the ceiling is vaulted. The entire back of the room is a bi-fold door to a deck. I know the room will be acoustically challenging but its all I got.
Because of the width and the vault, it would be hard (and quite ugly) to hang speakers from the ceiling pointed inwards. I therefore thought I could put them in-ceiling.
I'll take your advice on the Q speakers tho and have another look with my contractor.
Thanks!
peter