Well I took the opportunity to buy the Roksan K2BT with Power amp especially for this price; price of course isn't everything, you want the sound too. In my experience listening to this combo here you would not go far wrong at all (it's a MOSFET amp if anyone's interested) - it you didn't like it you could move it all on for the same price you bought it for - or as suggested, keep the power amp - lots of choice for you here. I've not heard the Sonys so can't comment, but as I said, at this price you could buy then sell it on for little if any loss if you didn't like it.