And to macdadtexas's point, each system and each person's taste has impact. It's been said here on agon and elsewhere a million times.
Goes w/o saying, but tubes, digital cabling and ICs can make one DAC sound miles better than another. I guess the key thing I found is the Havana and Tadac were more similar in my setup in that they're tube versus solid state and can be driven in simple 16/44.1 with similar good to great results, particularly with a clean/low jitter signal. The TADAC has the built in preamp and though many quip about the "tubyness" nob on it, it actually helped quite a bit in fine tuning my setup to match cabling/etc.
Macdad, I doubt you're the guy I sold my Havana too, but I did eventually sell it to a guy in Texas. Can't recall who it was though...
Marc