The tweeters will certainly end up a matter of personal pref - my best friend listens to his with tweeters out - we built him a set of speakers last summer, with Vifa and Max Pentivent (Canadian drivers similar to Morel or Dynaudio) and he prefers the tweeters out.
In his room, mostly untreated and open, with hardwood (though a nice area rug), I have to agree that they sound more open his way - either way they are great, but it was a revelation to me to hear my Totems in that room.
Now if I could only transplant his living room to my basement!
In any case, play with the setup, and keep what works best.
Mark