Summary: I love this thing, I had purchased a smaller sony speaker dock, and loved it; but after giving it to my best friend I needed to replace it. I originally was going to purchase the rdpxa900ip for $599, but to my surprise sony discontinued it and the price dropped.
Summary: Sony's XA900iP wireless speaker dock is one of four in the X-series that is currently available on the market, at the moment it's the highest model available out of the series with a huge price tag, just the mere thought will manage to make any persons eyes water.
Summary: Great sound, looks really good. However blutooth can be difficult and it does not take iPhone 5's/any recent ipod models in the dock. You must set up these wirelessly or through an Aux lead. I can imagine this would put many off. However for now, it's fantastic!