I can't speak to the Sapphire's because I have never had any experience with them. I am using a pair of Mirage Microsats for my rears in my basement system and I am pleased (after you get used to the omnipole design: they scatter the sound a little). That being said, I originally purchased these for my main system and I was not that happy. They have no bottom at all. I bought them to upgrade from some older JBL 500 bookshelves I had for my rears. I'm still using the JBL's in my main system.
The base problem is not as noticable in my basement because it is a very small area (8' x 10' with a low suspended ceiling) and the microsats are ceiling mounted. For that system I'm using an Athena sub and center with a pair of Mirage FRx1s for mains (love them).