Curious why the different manufacturers? You'll want to keep your speakers from the same manufacturer, and ideally the same line, or in some cases they're timber matched between lines. Many I/W and I/C speakers have aimable tweeters but as these guys have said, don't do it. Maybe for surrounds at most. Triad makes a compelling case for I/C but they're really expensive, and still not quite the same. Is the wire stubbed out, or are there holes cut, or what's the state of the room? What made you interested in, in ceiling speakers?