Yep, you're in the right spot.
I did ED about a year ago, you can see pics/itinerary here:
http://www.m3post.com/forums/showthread.php?t=605532
If you want to go to Amsterdam, then go for it. You might not want to cram too much in, besides a trip to Amsterdam. There is plenty to do in Munich for 2-3 days, and you could spend a full day (or two!) driving to Amsterdam, and back.
Things definitely take longer when you're travelling over there. You'll want to go slow, and take it all in. In other words, don't rush to do so many things. Plus, you might have set-backs like weather, etc.