Amp for Harbeth P3ESR and Cambridge Audio Azur 851N

My P3ESRs sounded amazing with my ARC VSi55 integrated.  It ran pretty hot in the small room I had it in and I recently switched to a Vincent SV 237 integrated.  It incorporates an amp with the first 10 watts in class A with a tubed preamp and has maybe 95% of the magic of the ARC, but in spite of the Class A runs much cooler.  I'm very happy with it.  I have no experience with the other amps you mentioned, so can't compare.

You might be thinking of the newest Vincent SV 237MK, however it retails for about $2,400 USD (are you in another country?), not $4.5K.  The unit I bought was a second hand Vincent SV 237 (no "MK"), the previous generation.  I paid $1250, or $250 more than the SV 500.