I bought the RC60i when I thought I would try to utilize the ceiling speakers as the rears in a 7.1 system (but abandoned the idea as mentioned above when it turned out it would not be so simple).
I have no idea how they sound but they were inexpensive compared to others, had an aimable tweeter, and were light. I know there are other brands that may sound better, and you will pay for that, but what about the whole idea of weight? All of these speakers are attached to the ceiling using dog-legs. Typical drywall can support a max of 8 lbs. Anyone use in-ceiling speakers that are large and heavy and how is that working out?
For me, it would have just been an inexpensive experiment, but I wanted to try it anyway. I had new wire run to the sides of the room where the side surrounds for 5.1 should be, but I thought it might be cool to have in-ceilings for the rears of a 7.1 setup. After all, the wire is there so why not use it?