I picked up the Mirage OM-9s today. The seller and I spent about 45 minutes with different CDs and movies (I brought the Avengers Blu-Ray, The Joshua Tree MFSL edition CD, and Led Zepplin 4 with me), and they sounded great. It was a no-brainer for $200.
I think that they have enough bass for my apartment, but I see what you mean about a center channel. I'm going to get a receiver next, then get a center channel a little bit later.
I'm thinking about picking up that Pioneer receiver. Will Best Buy match an online price, or should I just pick it up from Amazon?