Let me re-emphasize that the slam against ARC service is way off the mark. I have an older ARC amp and preamp. The service is so responsive and reasonably priced that I don't re-tube and re-bias the amp myself. I just have them do it. They are great.
I sent my pre-amp for service (noisy volume control), and after it came back I decided to be clever and do some soldering. I damaged it. I sent it back. I told them it was my fault plus it was obvious. They repaired my flub under warranty. This is a 30-year old preamp.
The great service is a reason to consider ARC if you are looking at tubes, not a reason to avoid them.