@wittgkatzi: That's an incredibly comprehensive write up! Cannot thank you enough for taking the time to help me out! I'll probably be using the 1st option and using the TV as a hub initially, since it has all the inputs I need, as well as an audio out for a 3.5 jack. If anything gets garbled for whatever reason, I'll try your other suggestion of a receiver.
Forgot to add, circumaural headphones were my preference, and I probably wouldn't be using them for smaller audio devices. So what you've suggested seems in line with what I was looking for!
And again, thanks everyone! I feel almost like I know what I'm doing now, well, enough not to make a totally rash purchase anyway.
I did try Googling this all first, honest! But I wasn't quite sure what I was looking for exactly, you've all made this a lot easier.