^^As per my eyes, the Panasonics do not have a good SD performance. Even HD performance was just about fine. moreover, I saw lot of dithering on the text on the panasonic, which almost made me cancel my plans for a plasma. But the LG PQ30 really impressed me in all these fronts.
The good points:
1. Text is sharp
2. Colors are natural
3. awesome SD performance
I got the PQ60 but the only difference is that the PQ60 has a single layer design. The service menu on my TV shows PQ30 only.
Everyone sees things differently, best is to demo both and see which one you like better.