Just from personal experience, in the price range you’re looking at, the KLH Model 5s are a great speaker for the money, and used would easily be affordable. I replaced mine with Harbeths, though I have no intention of letting the Model 5s go, and honestly, they really held their own against the SHL5+ XDs. The Harbeths sound better, but the KLHs certainly don’t have anything to apologize for. That said, the Harbeth P3ESR XD also seem like a really good option, though I don’t have any personal experience with them. I was considering the MoFi Sourcepoints before I bought the KLHs, and would still like to hear them, though I doubt the Harbeths would have to worry about being displaced. Good luck with whatever you decide on!