Lots of good info here. Just to revisit some of them, it would be helpful to know what aspects of sound reproduction are important to you and/or what things are you looking improve upon.
I had an Oppo transport fail on me, so u know where I stand on upgrading the Oppo.
Also, has anyone been able to compare the Liberty to the Bifrost? And, how are they at jitter reduction? The Oppo ain't a super transport in stock form, so if neither DAC has great jitter reduction I'd recommend including something like the Empirical Audio Offramp. Jitter can make digital sound so, well, digital. You can always add one later I suppose. Anyway, best of luck.