I use my smart TV as a monitor. IMHO I think the streaming is best done outside of the TV. I wish I could have bought a quality 85" TV without smart electronics.
My solution for an integrated HT and music system:
I use a 7 channel HT receiver for HT. I send 2 preamp signals from my HT receiver to my music integrated amp for the front 2 channels. When I want to watch a movie, I just switch the Music integrated to the input that I have the HT out front signals going to.
Jerry