The Panasonic one is an okay option. The sound is decent for the money compared to other All-In-Ones. DVD upscaling, however, isn't as good as current model Blu-Ray players.
Do keep in mind that when people talk about "wireless speakers" they generally mean the rear speakers connect to a separate box rather than the main unit. So there are still plenty of wires. Of course, if you didn't have speaker wires, you'd have (much thicker) power cables, or a massive battery bill.