Ayre MX R vs Pass Labs X350.8

Hi

I have shortlisted Ayre MX R's and Pass Labs X350.8 and have found sellers for used ones at similar prices.

Amp for use with Cary SLP 05 pre and Vienna Acoustics Kiss speakers.

I like a sound that is warm with harmonic richness and tonal density but fast and with some bass slam but not too bright on top as my previous Krell amp was with brass instruments.

Any feedback comparing them from experienced users of either or both amps in the context of their own systems or preferably with equipment similar to mine much appreciated.

Thanks