If viewing angle is a big deal, then I would stick with plasma. And since it's for a basement, you don't have the bright room problem that seems to be plasma's biggest issue. Panasonic p60s60 would be a great budget plasma, but it's not nearly as inexpensive as LCDs this size can be.
Compared to that, this Vizio is a steal at current prices. LCDs have some inherent drawbacks compared to plasma and viewing angle is one of them, but the panel technology used by Vizio is better than some other major brands at this. Mine looks washed out from the side when I enter the room, but that's an extreme angle, like 75 degrees. As soon as I'm actually in the room, it looks great.
Hope this helps!