As mentioned above, a TT from Rega and Project are a good place to start. They offer units in your price range that are pretty much plug-and-play.
If you decide that you want to go deeper into vinyl, the rabbit hole goes very deep.
Alan Shaw recommends solid state in the range of 100wpc. I think the Harbeths will be with me a long time so I'd like to treat them properly. Use will be primarily in the near field.
Looking at the Diablo, and others.
I'm investigating integrated amplifiers to power my new Harbeth Monitor 30.2 Anniversary Editions.
Do we have any Diablo owners in the group? I'd appreciate your comments.
Edit: Specifically the Diablo 120.