Name your favorite Integrated Tube Amplifier & why?

The Audio Research i/50 would be my top choice: 50W push-pull 6550 power tubes x4 (2 per channel), DAC and phono preamp modules, remote. Lovely sound. 

I might also list the Willsenton R8, which offers tremendous value for money: 45W with KT88s,also selectable for EL-34s for about 24W. Mine is no longer stock spec with a few internal mods and tube-rolling mods, I use it with a Denefrips Enyo R-to-R  DAC, remote. It handles bookshelf speakers of modest sensitivity with ease.

Ayon spirit 3  or latest model ,it has its own microprocessor that accurately adjusts all power tubes for wear ,not just average the Ma reading, when a tube goes out 

a red led comes on ,you replace tube ,and hit recalibrate button, 

also the case not cheap sheet metal that vibrates but solid machined aluminum ,

partts quality very high MUNDORF capacitors,1% resistors  and many other  much higher quality parts to the design , a little more expensive then say cheaper Chinese made prima luna , Ayon all made in EUROPE  AND THE MOST IMPORTANT THING on ANY TUBE PRODUCT the Transformers,and Chokes, which AYON  USES WORLD CLASS Lundahl from Sweden.

Leben for the best possible sound.

Line Magnetic for good sound

Excellent transformers which is where all the music starts.

Happy Listening

Tubes are sexy.

I use a Auris Fortissimo powering a pair of Wilson Sabrina X’s and I find it good. Have never owned any other tube amps besides some BHK hybrid mono blocks, so can’t compare to other integrates.