I have two pieces of tube gear, a DAC and a pre-amp.
The DAC is an overachiever for its very modest cost so I was willing to take a chance and go with a smaller vendor that seemed to receive universal rave reviews and that has worked out exceptionally well.
The pre-amp, an Audio Research, cost a good bit more but is still modest by some audiophile standards. For the bigger investment, especially first time out, I felt best going with a larger known entity like ARC not just becasue the gear sounds good but in hope of good customer service when needed, replacement tubes, etc. Maintaining the ARC is not horrible but it is not cheap (good QUIET tubes are EXPENSIVE). As much as I like the tube pre-amp, I still find myself thinking that when the day comes to replace it, I will try to go back to a good SS pre-amp in that I am not one who gets any enjoyment out of maintaining gear. I just want it to perform consistently well so I can listen to it.