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.

"...To Russ69, please take my apologies. I believe you were trying to be humourous..."

Thanks, no problem. I was shocked as hell when the General Electric Triton dish washer was the first thing Google grabbed. Us older (maybe I should say vintage) guys grew up with GE everything and GE commercials on the TV on all the prime time TV shows. I still fight to not say Victrola instead of record player. (Not really but my Grandad had one). The Edison cylinder player was up in the attic by that time...   

Back to the topic; I might try a Conrad-Johnson or a Prima Luna. The ARC gear can be a little dry and I would want to give the ARC pre a little more flavor with a musical amp. 

Thanks Russ69.         That's kinda what I was thinking about different sound. That's why I went with the Audio Mirror. This is my first tube set. I started speakers first, preamp second, dac next now amp. I have always ran SS. Starting in '77' with my Sansui 9090. Lots of info on tube sounds with the Prima Luna. 

@OP, 
I would also consider Atmasphere amps.
A quick check showed the ARC amps you are looking at are near $10K.
Considering your speakers are so efficient, I bet you'd get away with a lower powered amp. 
I own Atma MA-1's and they drive my slightly less efficient Vandy Treo's with ease.
And, dealing with Ralph Karsten is always pleasant. If you are interested, call him, he might have a demo available for a very reasonable price.
Bob