I've owned the Cosecant V3 and now the Crimson and have heard them all. Wonder what you didn't like and why.
It's not that I didn't like anything. I just like the Tranquility more in the price range that I have now. I really liked my Cary 306 at the time I was hearing other DACs and I wasn't in the market then.
The thing that I like about the Tranquility is the spatial characteristics and the microdynamics (the same thing, really). Nothing, and I mean NOTHING less than 5 grand has a handle on these characteristics as well as the T-DAC (Tranquility DAC is getting too long to type), especially with the delicacy that is just my cup-o-tea. You would never know it, but I'm into subtlety.
Dave