I'm about to move my hometheather to a new room. Today I use JBL 8340 as surrounds and ceeling speakers, but they are quite big, and I consider replacing them with i.e. JBL LSR30X.

Do anyone use LSR30X as surround/ceeling speakers? and if so, are they powerful enough and have you found a good solution to
how to mount them as walls and ceeling?