OP: Congratulations on the Harbeth 30.2s. I have the P3esr's and absolutely love the way they sound. You did the right thing by adding a sub to address probably the only shortcoming of the 30s.
My recommendation is to go with something that provides class A output, at least for the first 20-30 watts. If Luxman 590AXII is outside your budget, consider auditioning a 550AXII. IMO, it is better than the 507 as long as you keep your listening within reasonable decibels.
My top 5 picks (in no particular order) based on auditioning several amps a few months ago ...
-Pass Labs INT-60 or INT-25
-Luxman 550AXII (or 590AXII if you can stretch your budget)
-Hegel 390
-Coda CSIB (I have not heard it, but just bought one to drive the P3er's)
-Raven Osprey (lacks the bottom end control compared to other amps on this list, but boy that midrange and three dimensional soundstage is glorious and addictive)
Another amp that was highly recommended to pair with Harbeths is the Belles Aria Signature, but I never got a chance to audition it.
My recommendation is to go with something that provides class A output, at least for the first 20-30 watts. If Luxman 590AXII is outside your budget, consider auditioning a 550AXII. IMO, it is better than the 507 as long as you keep your listening within reasonable decibels.
My top 5 picks (in no particular order) based on auditioning several amps a few months ago ...
-Pass Labs INT-60 or INT-25
-Luxman 550AXII (or 590AXII if you can stretch your budget)
-Hegel 390
-Coda CSIB (I have not heard it, but just bought one to drive the P3er's)
-Raven Osprey (lacks the bottom end control compared to other amps on this list, but boy that midrange and three dimensional soundstage is glorious and addictive)
Another amp that was highly recommended to pair with Harbeths is the Belles Aria Signature, but I never got a chance to audition it.