The Trinnov and their own room correction will most likely produce at a minimum 10% better performance compared to everything else on the market. So, worth the $20k+ investment.
You will need to pair a Lumagen or MadVR Pro with that Epson since the Epson isn't True 4k and doesn't have tone mapping capabilities. Just pumps light out. Stick with JVC or a new Sony. Way better picture. You don't want to have to wear sunglasses while you watch movies or TV like Acu does....hahaha!
I would also invest in a K-scape and grab yourself some Terra servers. Skip the ripping and burning or "illegal" downloading (which will be filled with spam) and just grab 2x88TB Terra's and you'll be set for 15-20 years worth of space for movies.
I too would suggest going with a bigger screen if you can. 150"+ is preferred. Add speakers if you can and some additional subwoofers. Can't ever go wrong with more speakers and subs!