I'm looking to build a nice new headphone setup for a second room. After reading a lot here- and elsewhere- I am zoning in on: AQ Dragonfly to Schiit Lyr to HiFiMan HE-500 (though listened to the Senn 650s last week and liked a lot). I figured the AQ could also serve for occasional portable use with my Grado's. Seems tough to find a nice dedicated DAC plus powerful amp for the price of the AQ + Lyr.
Any other suggestions? Thanks very much,