Hi, just purchased a SONY STR-DH820, so far so good. Does any one have any advise on how to get the very best out of it, such as recommended setting, using Mission M3 series speakers set to Bi-amp, source connected by HDMI, all setting correct to play HD audio, any help would be great, cheers. oh and what does A.P.M mean, (Auotmatic Phase Matching)