Since I posted this in March, I have broken in my DAC 2.6, with (essential) op-amps and Burr-Brown filter upgrades, and D2D-1. I am sure the 3.1 is a better unit, but the 2.6/D2D-1 combination has been outstanding in my system. I do notice however, some CD's sound better without the upsampling. It is a nice feature that the 2.6 allows the choice to cancel the upsampling.
Assemblage - anyone???
I am curious about the lack of comments regarding Assemblage digital products, DAC 3.1, 2.7, and D2D-1. Although the reviews of these products in Soundstage and PlanetHiFi are generally excellent, Stereophile mostly ignores them, and the comments in these posts seem to be fewer than for MSB Link, BelCanto and others. I have a DAC 2.6 which I really like, and plan to add a D2D-1 for upsampling and jitter reduction. Should I be looking at MSB? Am I missing something? I would appreciate hearing from those who have had a chance to compare directly.