Definitely listen to
Dackelone , his ED "places to see" thread is Epic and was a huge reference point for my own ED.
It all depends upon how much time you have, but in Munich my highlights were:
Dachau
Augustiner-Keller
Hofbrauhaus
In southern Bavaria it was Hohenschwangau/Neuschwanstein
I read through a ton of ED threads and picked out what I thought was great and what worked with our schedule.
We also visited Heidelberg because I was born and lived my first year there....so it was a bit special. It also is one of the most beautiful and romantic town/cities in Germany.
Next time i'd visit a few other castles, Berchtesgaden, Eagles Nest and head into Austria.
Truly, part of the joy was researching by looking at the threads.....the planning was almost as fun as the doing
Have fun!