I have an Arcam CD 17, a Rega P3 & a Logitech transporter being driven by an Arcam AVR 600 - my speakers are PSB Synchrony Ones. I was wondering if I would see major improvements by introducing a 2 channel amp into my system (an ATC SIA 2 for instance) by using the pre-outs from the AVR. Would it make a significant difference to my system ? Could I use a pre/pro combo or am I limited to an Integrated amp if I want to continue using the AVR given that it has a host of HDMI inputs. Very grateful for your inputs - I've been very tempted to buy a 2 channel amp but I'm wondering if I would see any benefits. Thanks in advance Mohit