Toshiba is certainly not a 2nd tier company. I would put Samsung, Sony, Toshiba, LG, Sharp (although I'm not a big fan) and Panasonic at the top.
Although I'm not very familiar with Vizio, most folks seem to put it solidly in the 2nd tier and possibly at the very top of the 2nd tier. Another 2nd tier that might be worth a look is JVC. I've seen some of them at local stores and they look pretty good.
I would also place Mitsubischi and Hitachi in the 2nd tier, but due to their cost, I can't recommend them. All of the others you have listed belong in the bottom of the barrel and, in my humble opinion, should remain there unless you are truly desperate.