[Happy Camper]

Quote:

I don't want the sound to be more transparent, I'd like better dynamics and more body.
I'm probably asking too much for a $1000 dac though

I've been using a tube DAC with a tube amp and it's not too bad but with the 701. I'd think a transparent source with a tube amp and the 650s would be pretty nice. You want your source to be as real as possible. You color your sound with your tube selection and headphones.
 
IMO

 

[KingStyles]

The combo of a tube dac with a tube amp can sound really good if implemented correctly. Just make sure they both dont have a tubey sound signature.

 

[computerparts]

I haven't heard any Audio-gd dacs but from what I've read, they are very good. If you want more body and dynamics, you could try a different power cord/interconnects. Also, have you tried tube rolling that earmax? I would also suggest keeping the ref.5 for future flexibility. But If you definitely want a different flavor, I can suggest looking at these:
 
Musical Fidelity Tri-Vista 21
Monarchy Audio M24 or NM24