Wanting to try a tube amp.

 If you have a bad tube failure it can take out a resistor. The resistor is for protection of the amp. It is very simple to replace. When I had a resistor blow, my ARC dealer fixed it for me at no charge. If need be I could have done it myself. I think it has happened to me twice in 30 years. Use good quality hand matched tubes from a reputable dealer. I use Jim McShane. He burns the tubes in a bit before matching them just like ARC. But he is much less expensive.

 The Ref 110 is a superb tube amp and a bargain for what they go for used. I saw o Hifishark that one just sold for $3200.  I have had no trouble with mine since I purchased it. And I have no real desire to upgrade at this point.

 IMHO 100 watts is the sweet spot for tube amps. My speakers are 92db and the Ref 110 is an excellent match. You want a bit of headroom. I tried a Ref 75 and in my system the sound was not as open. I found over time that I much prefer tube amps with 4 output tubes per channel. They don't tend to sound thin at times like some amps. My old V70 was the same way.