Well, after that last post I don't even know why you would want any opinion besides that of the deified one, but here goes.
Meridian is a fairly hi-zoot manufacturer but that doesn't always equate to sonic bliss. IT does, however, carry a bit of prestige when installers recommend it. ...and they can command a high price for a classy name.
Are the wires already run? Many contractors do that as a selling point but, in actuality, it limits the new owner's thinking to anything except ceiling speakers.
Secondly, I'm not really a fan of ceiling speakers. They are great foe background music in restaurants and dentists offices but, for home theatre and music enjoyment, they don't make it in my book. With movies particularly, you want the sounds to appear to be coming from where your eyes tell you it should be and, unless God is speaking down from the clouds, overhead isn't it. That's why they have a center speaker mounted as near to the screen as possible: To anchor the voices to the screen. ext, the right and left speakers should be in the same plane. The rears, however can get by with ceiling speakers although I still prefer traditional side mounted speakers for them.
But, if the main goal is to hot have anything visible and they are merely an appliance to fill the room with some sound and the overall experience of the movie is secondary, then they are fine. Many people are happy with them. I'm not one of them.
I'll not disparage Onkyo since it's perfectly serviceable and know nothing about the sub, but you might want to see what alternatives he can offer for the speakers.