When my kids were at home I built a 5.2 Krell/Dunlavy home theater system which I also used for playing CD's in the "background" while the family was together. I work from home now, and built a NAD/JBL 2 channel rig in my home office which is used for streaming throughout the workday. Best of both worlds.
As an aside, when my son moved out into his own apartment, I treated him to a pair of Klipsch Five's which freed him from the headaches of listening through headphones while wearing glasses. He was immensely grateful to have his first hifi system, perfect for the small size of his apartment. And he streams music through his PC even when he's not working or gaming. Having music fill the apartment adds warmth... just like home.