Digital inputs in high end 2-channel preamps

Digital input means the preamp would need to include a D/A Converter within it's architecture.

Mitch -
I actually agree with you on this.
That is why I have a Boulder 1012 which is my Preamp/DA Converter.
Incredible unit!

Well, Mitch4T, check out the McIntosh C48 and C50 pre's. They have 2 optical, 2 coaxial, and 1 USB port. I have one, and for me personally, they could've left that nonsense off. I hate paying for technology that I personally will never use. But for you guys who think you need it, this is a superb preamp. It has a superb DAC in it for this.

Part of the reluctance on the part of manufacturers to build, and consumers to buy, a single box with both preamp and DAC might be that DAC technology is changing so quickly. Keeping them separate has the same advantages as other separate components provide, a simpler upgrade path and more choices in tailoring the sound to your liking.