The main machlokes is: The Ramba”m holds that the world of Neshamos is the final goal and end of Geulah process, not being in a body. But a lot of others, from the Ramba”n to Ramcha”l maintain that Tchias Hamaisim is the final stage.
Then there are a lot of sub-machloksim that branch off from this. this takes volumes – not quite for a coffee room post.
You can see the Sefer of Rabbi Kirzner (which I was priveledged to write from his tapes) – “Maoz Latom” Vol. 2.