Hi ya'll

I'm looking for rear L/R and eventually C speakers. I'm running the Athena ASB2/ASC1 as my Center and Front L/R and am very happy with them. My reciver is the Yamaha 570KF 6.1 (OK). I am limited for size in my rears so am looking at Paradigm Atoms, Paradigm ADP 70's or Energy Act 1's. These are all in the $300 Cdn price range and are all sufficently small. I have a open concept living area, so they need to carry quite well (~10ft). Opinions? Advice? any comments you have to offer would be greatly appreciated!
Thanks and happy holidays!