That setup with the fans at 80% is loud enough that you wouldn't watch television in the same room. Not sure about a lower fan speed.
I am sleeping almost next to my rig ^^. Not using a case. I set fans to 40-50 on my sleepmode, and 70% during the day. There is a winter here so they are still at 75C even in sleep mode.
my setup
3x Toxics 280x
1x MSI TWIN FROZR 280x