Ok, so I currently have a Sony STR-DG820 7.1 integrated amplifier. From my amp I run my PC (Jack T/Rs to RCAs from my PCs external soundcard) and my PS3 (HDMI to amp, then to TV). My speakers are Tannoy V1s plus a random subwhoofer (2.1) I was thinking about getting a Marantz PM6004 to replace my Sony amp. Reason 1, I don't have a 5.1 speaker set-up anymore due to space restrictions. Reason 2, my amp wont allow 3D to pass through from my PS3 to my 3D TV. Reason 3, I understand that listening to CDs will sound better from a decent dedicated stereo amp rather than my "do it all" 7.1 amp. (correct me if I'm mistaken though) Reason 4, my Sony amp has a well known design fault which produces a slight hum even when speakers aren't in use (it annoys me ) So the problems/questions I have are: My PS3/amp can output "HD Dolby/DTS" from my blu-ray films in 2.1 which sounds great. If I move to the Marantz amp which would connect to the PS3 via RCAs I'll lose this "HD" audio, right? I also just wanted a general opinion as to whether this amp move would be worth it? negatives? positives? Any help/opinions would be really appreciated!