Im using the Havana with my T1/O2 MK1s. All I can say is wow, it sounds much different than my Cary 306. Voices especially sound incredibly natural. My Havana isn't anywhere near being burned in yet, but it sounds VERY nice. Its also a lot smaller than I thought it would be, I'd actually label it "Cute" looking lol. Its actually quite detailed where I thought one of NOS dacs weaknesses were detail. Soundstage sounds quite expansive as well. I need to let it burn in some more though, maybe get a better tube since I hear the GE 5670 isn't exactly the greatest. I might add, the synergy with the O2s is very good, I think better than my Cary. The Cary does sound quite digital, especially after listening to the Havana, so now the music sounds a lot fuller and natural and works well with the O2 (some things through the Cary sound incredibly dry with the O2).
Edit: Man I just cannot get over how enthralling female vocals are through this tiny thing. Oh and piano and violin sound very natural. Its hard to mimic its real tone and stuff but I think the Havana does an excellent job. So what are good tubes for the Havana? I heard the Bendix 6385 was the best but incredibly hard to find and Sylv gold pins stink

Any other good choices?
