Better off with a higher performing desktop system, than whole room, if you want to spare the boss. In other words, if you like the effect of loud music dynamics, without entertaining the neighborhood, a simple 2.1 system is better than hearing something in the whole room that you always wish could be just a little bit louder.
I mean, I can't imagine listening to AC/DC at casual levels. It's just not done.
I have such a system. I stream from my desktop pc, since I am there, more often than not. At least at night time.