Yesterday I purchased a pair of 683 b&w speakers and a Decco (DAC + Integrated Amp)and am now using iTunes to play my music. My question is, how should I be controlling the volume in my system? That is, should I be using the PC volume, or the volume on the Decco? I've read various comments about turning the volume on the PC all the way up, turning EQ off, etc. What's the correct way, and is there better software I should be using to play my music (i.e. something other than iTunes)?