I went for the A2, but I was seriously considering the Magni 2 Uber (or the Lyr2) as well.
Even though I know the Magni 2 has a few 0.x watts more I still wanted the A2.
Never had an amp/dac for my headphones before so I had to start somewhere.
Having had an education as an engineer and building my own amps (but it's been really a long time ago) I know how
important good power supplies are and I figured the A2 has a 'heavier' PSU/higher condensators then the
Magni2 and that was one of the things that pulled me towards the A2.
Also bought the Modi2Uber - but I really wish there was something in between the Modi2 and the Bifrost (with USB) as
I think the price difference is too big. I would have bought the Bifrost (or that something in between with USB) if
it had been somewhat cheaper. Though I might get the Bifrost some day, even if it's just so that I can stack it.
(wonder if there's a bigger housing for the Modi2
)
Till then I'm enjoying the A2/Modi2Uber with my HE-400 immensely.