Best Integrated, period.

Accuphase E550 or Sugden Masterclass.

The VAC Phi Beta would be my choice if I wanted an integrated amplifier. Then an Art Audio Carrissa, with the right speaker.

Perrew, nice lineup. . . while there is no 'best', there is going to be an integrated that you may end up liking 'best'. . . that will depend on what else is in your system, on your sonic/musical expectations, and to a lesser extent, on what music you enjoy listening.

First, let me clarify that I do not believe that there is any one 'best' of anything in this hobby. The following response is what I personally consider to be the best to my ears, and in my experiences thus far.

On the more expensive side of town, I'd say either the Karan Acoustics KA I-180 (solid state), or the Jadis DA50RC (tube).