Is it worth spending the cash on a high end BD player like the 103, if you only have a low-mid range sound set up? I need a new BD player and am considering the 103, mainly because of the great things I'm hearing about the sound reproduction, but my sound set up is currently an Onkyo SR508 (http://*******.com/c868frr) with Boston Acoustics Soundware 5.1 SE package (http://*******.com/cmyjtc8)
Am I going to hear much difference between the Oppo and my current player (Panny BDT110) using this set up?
The easiest answer is to try it yourself, with your equipment, and see. For example, if you buy direct from the OPPO Digital web site, they offer an easy, 30 day return period. You only risk the shipping cost.
However, when you use HDMI audio, the primary factors for sound quality are things going on in your HDMI-equipped AVR, etc. That's where the sound is being processed. People using HDMI audio primarily buy the 103 for OTHER reasons, such as the range of things it can play, its speed and flexibility, and video capabilities. As well as secondary factors such as OPPO's highly regarded customer service.