OP, “ …I love vinyl, do tube DAC’s sound more liquid?”
In general yes. In my system the vinyl and digital ends sound the same (I carefully chose equipment to do that). Both detailed, but very natural and musical sounding.
Also, at my investment level I have invested about the same in each leg. Typically at much lower levels of investment and higher levels you must put a bit more into digital leg to have it perform at the same level as the analog end. Also, both my Phonostage and DAC are tubed.