DAC with Escient Fireball s & FLAC recordings

Current signal path:

Escient Fireball(s) with 600GB of FLAC recordings

Through a CAL Audio ALPHA
(via Audioquest VDM3)

Into a Rotel RSX-1067
(bypass settings)(via Audioquest King Cobra)

Over to a Rotel RB-1080
(AQ Same as above)

Eventually arriving at a pair of Thiel CS1.6's
(via DH Labs ST 14??)

*Misc - REL R-305 sub(via Neutrik(sp) connector coming off the RB-1080)

I can't say I have any serious complaints, however:

Based on the improvements noted with the ALPHA -- I can't help wonder if another DAC may yield even more joy.

Thanks,
--ksr