I would second the plan to buy just the mains to see how you like them. I own M50s ans M22s as well as several other axiom speakers for center and surrounds which I acquired later. Initially we went with the 50s for the mains and loved them. We bought the 22s for the bedroom afterwards. Part of our decision to get the 50s was the close cost between them and M22s plus stands. In direct listening comparison they both sound very good with subtle differences.

Mark