Which Wadia a better buy in value terms?

Actually a Resolution Audio CD 55 is a better value than either of those choices

Could you share with me the REAL sonic difference between the two i.e. 850 & 860 and is the premium worth it? Much thanks.

The 850 sounds like a good deal, you probably won't lose on that one. I have an 860x though I have not tried the 850. Your remarks in regards to the upgradability to 861 is a valid one. The reports of 860 to 861 owners suggests that it is a substantial improvment. I have also owned the Resolution CD 50 and in my opinion it is not as good as the Wadia 860. Many of the features that separate the 850 and 860 are Digital inputs (an option on the 850) and the 860 has a more sophisticated display. The transport mechnanisms are diffrent as well. Good luck.

hgeifman--i was under the impression that wadia is not "out of business". but, instead is undergoing a re-organization. furthermore, i was told the new entity, to be managed by a number of former wadia-types, will honor outstanding wadia warranties and will service wadia machines out of warranty. is this different than your understanding? dated info perhaps? thanks.

I do not think Wadia is out of business. I read the original investors wanted out, so they are reorganizing. Will be back soon.