NAD 720BEE inputs


Hi,

How can a supposedly high-end piece of stereo equipment like the NAD 720BEE not include optical or coaxial inputs? Wouldn't coax or optical provide higher quality sound -- wont the traditional RCA connections comparatively diminish sound quality?

Thanks
landoa
Post removed 
Regarding the digital cable vs. analog cable issue, I've done several A/B tests on my own equipment and in all instances music through good analog cables (e.g., Nordost Red Dawns) was far more musical than that via a digital cable. Just my .02 worth.
For example....

The analog outs from my big cheap mega-DVD changer sound far better than the DACs in my now retired NAD T743. I'm not talking about subtle differences between $500 and $1000 CD players... I'm talking night and day is there bass or isn't there differences (and yes, speaker settings were correct).