A little bit off topic. Sony is not a good alternative to Samsung. In fact, some of their manufacturing is shared.
Panasonic plasma displays don't just offer the best price/performance, but offer the BEST performance bar none (with the rare exception of the ninth generation Pioneer Elite Kuro plasma).
Following Panasonic are Samsung's plasma displays.
Sony's LCD/LED displays don't even make the list.
For LED/LCD, I would go with Sharp (and did go with Sharp). The problem with Samsung with televisions is Samsung is notorious for putting on display a TV whereby it manufactures the display with good quality. It, however, outsources a large portion of the panels it uses, lots of times from no name China manufacturers. So, you can view three Samsung sets with the quality being different for each. Many of the online forums complain about the panels looking different at home then they did at the store.
Sharp has been making displays longer than anybody. It has gotten into some legal battles with Samsung over IP theft. Further, Sharp builds all of its displays. I am very happy with the quality of my Sharp set. With that said, I did see a beautiful Panosonic set recently.