I'm seeking a couple of recommendations for a decent but affordable AV receiver to replace my Marantz amp and allow HDMI inputs and outputs. I don't see any need to have Airplay as I will have the ATV hooked up to it and I have some fairly cheap Wharfedale 5.1 speakers. Blu Ray is Sony. Are the auto setup systems with mics to configure the speakers worth the money or just a gimmick? Am looking to spend up to £300 I guess, though the cheaper the better!