to start the conversation....why "in-ceiling" speakers ? When you mention "movies", then you are considering a home theater setup and not just ambient background music. The optimum home theater speaker setup uses directional monopole speakers in the traditional Dolby 5.1 or 7.1 speaker layout. Dolby recommends the speaker tweeters be at "ear level", or as close to it as your layout will allow.
In-ceiling speakers, even the best, are a compromise. You will never create the best surround sound soundstage with the audio coming from above your head. If esthetics (or the wife) require all speakers to be "out of sight", then I really hope you will consider in-wall speakers for at least the front three main speakers, left-center-right, and a separate stand alone in-room subwoofer. The 2 (5.1 system) or 4 (7.1 system) surround speakers may be in-ceiling units, as long as the speakers, or at least the tweeters, can pivot to aim at the listening area.
B&W is a superb company for both in-ceiling and in-wall units, as is Triad, Definitive Technology, Klipsch, PSB, Polk, and many others.
Now, after all that preaching about the ills of in-ceiling only speakers.....a few questions:
1. please let us know your budget,
2. describe the room you want to convert,
3. what audio/visual equipment do you have now, or want to get to go with the speakers,
4. are they any "deal breaker" rules you must live with..... i.e. "she who must be obeyed" said "no big speaker enclosures in the room !"