Nothing will sound right coming from above your head. If you get some on ceiling or speakers that can be aimed it may work. Thiel Powerpoints come to mind here. They are not hidden but sound good and actually point at the listener. Others such as KEF have made drop down speakers and Logans have directional tweeters along with the B&W CCM. I've heard all and would say that you really won't be happy with a speaker that points straight down.
Final note-you really should look at a sealed speaker. Factoring in your ceiling as a baffle will be a mess. Some of these have really nice aluminum enclosures. A bit heavy and harder to install but well worth it.
Final note-you really should look at a sealed speaker. Factoring in your ceiling as a baffle will be a mess. Some of these have really nice aluminum enclosures. A bit heavy and harder to install but well worth it.