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Headphoneus Supremus
Question. Which is better? Schiit or Audio-GD?
At this level I think 'better' is not very relevant as they both are very good at what they do. I don't have any Schiit gear but I've read a lot about them and, compared to Audio-gd, Schiit has been said to have a brighter, more clinical signature, but again I haven't heard the latest Schiit solid state gear so I can't really say from experience.
In your price range I would say that these two options seem to be the best value. Hopefully someone who has heard both can compare directly, or you'll just need to go to the appropriate threads and ask there. Good luck.