Unless things have changed in the last year or so, Panasonic makes some or all of that Toshiba (Toshiba's were rebadged Panny's from what I have read).
As you know the 8UK is the commercial model of their consumer line. That 8UK is very similar to the Panny TH-50PX50U or 500U.
If you are OK with no speakers, stand and tuner then the 8UK is a great plasma and probably has a very similar picture quality with more picture tweakability.
Which is the better TV? Right now I'm debating between those two with the Pan. coming out ahead because it's significantly cheaper.