I bought the 6' TSC blade a few weeks ago for $350. You definitely get what you pay for -- it's among the lightest duty blades I looked at, inline with the price. I'm only using it for snow a couple months out of the year, so the cheapskate in me overruled my normal urge to buy the best I can afford.
I really liked the EA heavy duty blade and some of the Howse and Land Pride units I looked at. If I didn't already have a heavy duty Howse box blade as my go-to implement for soil and gravel, I would have stepped up and gotten one of these more expensive rear blades with tilt and slide features.
So I'd say the TSC blade is fine for snow and light use, but otherwise spend more money for a better blade with more features.