That's a pretty healthy budget. The RBH setup above would be hard to beat. What's available in your area to demo? Arendal has return shipping in the U.S. to let you try out their speakers. 1723 THX tower system might exceed $10k when you add it all up, but with the
1723 Monitor THX you could build a great system (
ShadyJ reviewed them) assuming you will be adding subwoofers. They make a center and surrounds and have very good subwoofers as well but no in-ceiling ATMOS. Paradigm makes some good ceiling speakers.
SVS also has return shipping, so also an option if you like the idea of home trials.
I really like Philharmonic Audio and their
HT Tower and
HT Center would come in at $5,800. Their BMR Monitor or Ceramic Mini could act as surrounds. Very neutral sounding speakers with a relatively wide dispersion if you like that type of performance.
Of the brands mentioned above, are there any that stand out for you?