No single answer...it depends.
In my case I started with a tube DAC and then added the tube pre-amp and have since used both tube and SS dacs with good results. The difference will be more in the specific sound you are looking for rather than the DAC technology used. If I had to choose between tube dac and tube pre-amp, I would go with tube pre-amp.
In my case I started with a tube DAC and then added the tube pre-amp and have since used both tube and SS dacs with good results. The difference will be more in the specific sound you are looking for rather than the DAC technology used. If I had to choose between tube dac and tube pre-amp, I would go with tube pre-amp.