The equipment looks good. It looks like you did your homework there, speakers, subs, projector, AVR, all look like great choices to me. You will need an additional amplifier for the full 11 channel sound. That Yamaha only amplifies 9 channels. I would think about getting outboard amplification for all the speakers eventually, if only for taking a load off of the AVR. Amplification will generate heat, and heat will reduce the life of the electronics, so the further you can get that heat away from the processing components in the AVR, the better.
One thing you can do, since that AVR has pre-outs, is use active speakers. You might think about using three
JBL LSR308s for the front stage- they are very good speakers and they are self-amplified. They probably have superior dynamic range to the Elacs as well. You can use
JBL LSR305s for the surrounds. They are also active. That will all take a tremendous load off the amp. Spares you the expense of buying an additional amp too. I think the JBL LSRs have a better chance of keeping up with the dynamic range of the Hsu subs too, those subs are pretty outrageous. Using an LSR for the center speaker gets you away from the compromised MTM design of the Elac center as well, so it would be a better center.