I've been more impressed with what I have heard from the angled 8" speakers from Monoprice for whatever reason. If you are just doing this for background audio, either set sounds good. I use a lot of these speakers throughout my home, and they are all of acceptable or better quality for in-wall/ceiling speakers.
For many of my TV locations on the top floor of my home I think I will be opting for the angled 8" speakers as it is far more directional with the sound which I don't think is as good for background audio, but it is excellent for TV that requires in-ceiling speakers.