Schiit "Gumby" owner considering Ayre Codex -- advice?

I have an Audio Research system driving Vandersteen Treos, and listen mostly to classical music.  My DAC is a Schiit "Gumby" (Gungnir Multibit).  My listening tends toward solo piano, small brass ensemble, but also big symphonies (Mahler, Bruckner).  I look for a relaxed sense of detail and openness and texture.

Yesterday, I was given a very strong recommendation for the Ayre Codex.  So now I'm wondering what sort of differences that might reveal in my system.  I've seen raves for the Codex, including comments from Gumby owners who switched.  But I've also seen at least one comment from someone who preferred the Gumby.

What sort of people / systems / listening do you think favor one over the other?

Given my system and listening, should I look for the opportunity to sell the Gumby and get a used Codex?

Thanks in advance!