Every breath you take we'll be watching you
Jokes aside, I'm not so sure about balanced being a standard! I would rank digital out in front of balanced phone out, and have manufactures starting to make more DAC/AMP that can do the whole full balanced thing or tube or whatever.
p.s. Your full size is my dream setup. Just saving for the MK6 and I think I'll be good too (until I get ridiculously rich and go for a Audio GD Ref10 :S)
Haha, well I'm keeping the NFB10-ES2 in my back pocket since it's a simple upgrade to get full DXD playback I'm glad you're considering the LD MKVI+. It's a real gem.