Your certainly getting the best out of Amsterdam. I really ought to visit the city and see the van Gogh museum & the Rijksmuseum.I really love Dutch art, so many great artists.
I really liked Amsterdam Ray, I'd recommend it (and the museums) if you get a chance. I noticed quite a few Englishmen as well as Americans there. Right now I'm in Paris for the first time, as I mentioned in one of the other comments.