HDMI vs analog

I have a Marantz BD8002 Blu-ray hooked to a Marantz SR8002 receiver. For now I am using my blu-ray as my cd playback. Currently I am only using my HMDI connection. The sound is very good but I am wondering if would/should experience richer playback if I was using my analog connection for cd-playback? Would the DAC process be any different/better? Any insight as to how I might tweak my setup to ensure maximum playback quality would be helpful.