I've got the Linn Custom 104C in-ceiling speakers for my surround speakers in my HT system. They are a step-up from the Sekrits, I believe, and they sound great. However, I can't say I did a lot of shopping around. I already had Linn speakers in front and saw these on an open-box special on A'gon classifieds. However, they have the same 2k array drivers as the Linn Majik speakers (i.e., they are a 3-way speaker design).
That all being said, there are tons of good options available out there.
That all being said, there are tons of good options available out there.