I've searched all over the internet to find out some info on these tires. I've tried the 712's, azenis, and i'm currently on es100's. I've found some interesting facts about the mx, azenis, and es100's and trying to decide what i want to run in STS this year.

tread widths/treadwear
azenis - 8.3"/200
mx - 8.5"/220
es100 - 8.2/280

I know the es100's probably aren't the best choice of tire but they are doing much better than i was expecting. I may event stay on them for the full season. I know the azenis are good tires but i haven't had a chance to test them back to back yet and I don't really like how they start to lose grip when they get too hot which happens at most of the summer events down here in the south. That is a reason I am thinking the mx might be another good tire choice. Its treadwear of 220 could show that it is similar in terms of grip to the azenis and tread width appears to show its wider so I'm looking for more info on it. If anybody has any reviews of the tire please let me know.