Upgrade Hint 6?


My Parasound Hint 6 sounds amazing but I suffer from the same obsession that many of you do.  How far up the Schiit DAC food chain would I need to go to get an appreciable improvement in sound?
bartimusc
"DACs really don't get any better than what can currently be bought for ~$400. "

I didn't know that. 
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Good question.  When I stream music from my Bluesound Node 2i I do not discern a noticeable difference between the Node DAC and the Hint DAC.  Since the Node is relatively inexpensive I figured maybe a DAC upgrade would be warranted.