Does any one have one/ listened to the sr7400. Trying to get a demo is like trying to get blood from a stone. I am interested in these because of marantz musical ability on there amps while still being able to thump out any movie without stress and the amp has the new pro logic X fromat . It also has a rs232 port for a little furute proofing. I have seen them for arround £500 . Any input will be greatly appreciated.