I haven't personally heard this combination, but the Audio Note P2 SE (18 wpc) is reputed to be an excellent match with the Quad ESL-57 speakers.
I can vouch that the P2 SE is very reliable amplifier as I have owned one since 1995 with never a problem.
I can vouch that the P2 SE is very reliable amplifier as I have owned one since 1995 with never a problem.