OK, so I've tried the SE300 with the Atrium Closed, and Verite Open. Both are pretty good. You can tell it doesn't have the full power of a desktop Amp, but for a portable player I am pretty impressed. It really does sound good for such a little guy.
Pros: Very smooth and relaxed sound. Great detail overall. Can't state relaxed enough. Just grooves.
Cons: Lacks hard bass impact. Bass is still present, and very good. Just doesn't have the weight I like off the desktop setup. Top end retrieval could be slightly stronger. This might be a characteristic of the R2R dac, but I don't have much experience with them. This is my first R2R.
So far I like the AC better on it, as it has more bass, but more to come. Testing Caldera tonight.
And this too.
Side note, do you all have a favorite bourbon or drink while you ZMF it up?