My most recent set of 4 Cooper CS5 cost $89 delivered for the four after rebates from Discount Tire Direct, that's $22 per tire. There is really no reason to buy these no-name tires, except in an emergency, when these kinds of deals are available every few months. Plan ahead and jump on the deals, even if you don't need them quite yet.
What size tire are you buying that there can be a $100 per tire difference?? That would really give me pause.
Tires are an area I won't venture into unknown Chinese brands. It's one thing if an mp3 player fails, quite another if a tire does.