These keyboards have to be pretty hefty and you need a good stand. @purplesinger recently got a new stand with a gas spring that seems pretty good. You need them to be easily adjusted, but sturdy. I expect there's not so much demand for electronic harpsichords, but if you can find a good sample library you could trigger that over MIDI. The feel is harder to change.

I am no real expert on keyboards. I have a couple of basic ones to play around with.