Sony scd xa5400es or dvp ns9100es?


I currently own a dvp-ns9100es and just wondering how better a stock scd-xa5400es will make. Has anyone tried comparing these two?
johncdnt
I happen to presently have both units, but in my current setup I use the 9100es as a transport with a digital cable to a Theta Gen Va DAC. I'll bypass the DAC and run it directly to my preamp this weekend and A/B it against the 5400 and report my impressions.
Closdesducs, does your 9100ES out to the DAC make a loud audible pop when you open and close the disc tray?
I recently bought the 5400. I am using a Marantz receiver for now. Should I use digital out or RCA? If I plan on Modwright upgrade later, should I look for pre or DAC to pair with it? (haven't received unit yet)