IMO, Pass X amps have no peer when it comes to dynamics, and dynamic swing. Seems to me, with the Supra in hand imparting a wonderful sound, all you need is the ability to spark up your system, keep it crystal clear, and unfatiguing. With your fairly efficient great ribbon loaded P10s (89db/4ohm), you don't need one of the monster X amps, a used X150 will do <$3000.
I'm using an X150 on the Piega's daddy, the Apogee Duetta, with spectacular results, and it presents a more difficult load at 86db/3ohm.
I'm using an X150 on the Piega's daddy, the Apogee Duetta, with spectacular results, and it presents a more difficult load at 86db/3ohm.