I have a GTP-400 that I bought new some 16 years ago that continues to serve me well. It's one of those audio products that IMO performs WAY above its pricepoint. It may not have a lot of bells and whistles, but it jusg gets out of the way, adds little coloration of its own, and just makes music. And yes, it has a very good MM phono section.
Other Adcom GTP's with a phono section:
GTP-500
GTP-500 II
GTP-602