In general, in-ceiling speakers are a major compromise when used for the 5.1 main listening channels.
Hi Jason, I haven't ordered the speakers yet as I grapple with one last decision regarding which Elac speakers I should get. The Elac Debut 2.0 bundles sold everywhere include a center speaker C6.2, two floor-standing speakers F6.2, two bookshelf speakers B6.2 and a subwoofer Sub3010. Looking at reviews, C6.2 and B6.2 are widely praised for their performance, but reviews of F6.2 are mixed. Also, I am a little concerned that two F6.2 towers might overwhelm the room especially when using a couple of subwoofers (the room size is 16'8"x15'10" with 10-12' vaulted ceiling). So I am thinking of getting one C6.2 for the center, four B6.2 speakers (two for the front, two for surround) and a couple of subwoofers. Also, I am not thinking of replacing the ceiling speakers yet (although they could be because this is a builder-built house, so we'll see). What do you think?