One of the first and best choices I have made was to add a tubed phono stage to my system. The order I added tubed components was preamp, phono stage, cd / DAC, and finally amp. Each step added musicality and emotional connection I have never been able to get from solid state (and I have owned some pretty good solid state stuff).
If I was starting from scratch I would buy all tube gear.
If I was starting from scratch I would buy all tube gear.