Not a complete replacement for Foobar2000, but you might want to take a look at Quodlibet, which has many of the important niceties, and also is good at metainf

Not a complete replacement for Foobar2000, but you might want to take a look at Quodlibet, which has many of the important niceties, and also is good at metainfo handling, where Foobar2000 shines especially.