I don't have experience with the Monitor 30's only the 40's and the SHL5 series. The best integrated amps I have heard with the Harbeth's are the Aesthetix Mimas and the Ayre EX-8. The Mimas was what I chose but I liked the EX-8 almost as much. The older Primare integrated i30, was good as well. I think the Belles Aria Signature may be a good fit as well. I personally did not like the Pass amp I had on my Monitor 40's but many users of the combination are very happy. Try to listen to as many as you can for yourself.
I don't like tubes with Harbeth speakers in general though my Mimas is a hybrid and there are many happy Harbeth owners using tubes. I really think SS amps bring out the best qualities of the Harbeth's.
I would however, take the advice of Monitor 30 owners as a better guide than my advice. I have never owned a pair of the 30's, the CS7's or the p3esr.
Good Luck!
I don't like tubes with Harbeth speakers in general though my Mimas is a hybrid and there are many happy Harbeth owners using tubes. I really think SS amps bring out the best qualities of the Harbeth's.
I would however, take the advice of Monitor 30 owners as a better guide than my advice. I have never owned a pair of the 30's, the CS7's or the p3esr.
Good Luck!