I would buy a used Basis 2200 with Vector arm or a SME 10 or 20 with SME 5 arm in that price range. Any of those choices would be a big step up, with the Basis or SME 20 being very significant. Be sure to budget enough for a phono preamp suitable for these turntables. I assume you already have something high quality, but it is not mentioned I your post.
The SME will easily play at 78. Not sure about the Basis. It may require a different pulley.
The SME will easily play at 78. Not sure about the Basis. It may require a different pulley.