I have an original Ayre QB-9 and I love it. The Schiit Iggy does not do DSD so keep that in mind. The limitation of the original QB-9 is only a USB input. The Ayre Codex also has a Toslink input which I can use with my Oppo CDP and it is compared very favorably with the new QB-9 DSD DAC. So, personally, I am in the market for a used Codex. Other DACs to consider are the Holo and Border Patrol. A used QB-9 DAC would be a fine choice if you can live with only a USB input.