I've finally convinced my dad to upgrade from his Bose Acoustimass nonsense. He constantly complains about not being able to understand dialog.
What he really wants is a soundbar system, which... fine, it should be good enough.
The Vizio SB4051-C0 looks like a pretty good choice. 5.1, a serviceable subwoofer.
If I want something better, what should I look at? The Vizio SB5451W-C2 looks good at $500. Is there anything else I should consider? We definitely need something that will play with some volume (I think he's getting a little hard of hearing though he won't admit it).