When I bought my e.One DAC 2.5 3 months ago, I asked a salesperson at Audio Vision SF which Bel Canto converter he would recommend as an upgrade for the 2.5's USB input, he said "the mLink will give you the most bang for your buck".
My interpretation of our conversation was that the uLink would be OK for the 2.5, but not a big enough jump in sound quality to justify the uLink's price. And for the price of the REFLink, that would be too big of a price to pay for the (limited) upgrade to the 2.5.
Point being is that you would be better off buying the 3.5 DAC VB II than buying the DAC 2.5 and the REFLink together.
My interpretation of our conversation was that the uLink would be OK for the 2.5, but not a big enough jump in sound quality to justify the uLink's price. And for the price of the REFLink, that would be too big of a price to pay for the (limited) upgrade to the 2.5.
Point being is that you would be better off buying the 3.5 DAC VB II than buying the DAC 2.5 and the REFLink together.