Ayre V5x vs Pass 150.5

I'm thinking of upgrading and considering these two amps. They'll be driving Gershman Avant Gardes. I listen to a wide range of music, but most critically to jazz and classical. Have you compared the two and what are your thoughts?
I havent compared these two directly. Nevertheless, I love my Pass! I listen to a lot of Jazz, a fair amount of Classical, along with a healthy dose of Female Vocals. Great amp. The Ayre is too, or so I have been told.