I've never had them but they are one ugly tire.
For $10/tire difference, I would get the best rated tires if I were you.
Tires are so important to safety. We are not talking about $100/tire difference here.
Again, Spec-X is now $10/tire off. So, you are looking at about $140/tire. That is not much difference from the Firestone, which is about $130.
$10 diff!