You have put together an incredible system that surely must be satisfying and enjoyable. I am certain that you are fully aware that your Monitor Audio PL500 II's are a 4 ohm system. My only suggestion would be to contact the speaker distributor representative directly to discuss the particular amplifiers that they use with that speaker. Many times they are reluctant to divulge that information fearing the information would be an endorsement.
Guido may have answered your quest!
Often there are is a single amplifier/speaker combination that is simply magic. Specifications rarely mean anything. A 400 watt/channel amplifier by one company will not sound anything like a 400 watt/channel amplifier by another company. Enjoy your Rowland equipment. I for one purchased a different preamp after auditioning an Ayre. They are not for everyone.
Guido may have answered your quest!
Often there are is a single amplifier/speaker combination that is simply magic. Specifications rarely mean anything. A 400 watt/channel amplifier by one company will not sound anything like a 400 watt/channel amplifier by another company. Enjoy your Rowland equipment. I for one purchased a different preamp after auditioning an Ayre. They are not for everyone.