I ran 245/45 Kumho 712s for 3 yrs...still had another season on em..For the price they're tough to beat...I even pulled 1.9 60s with em...at 35 psi...As usual, it depends on your budget...
Tough choice. I'm very happy with my Nittos, but I havent tried anyother brand of tires. So far I have noticed very little wear and I've had them on for almost a year.
I say go with the 712's, I have them pn my car and am pushing 300 rwhp.. they have great grip for the price. Unless you got moiney to burn then go for the nitro 555. just my .02
I have the Kumho's and have had good luck with them. I have had them for almost a year and I haven't noticed any wear really. The Nitto's are better though and for the difference in price I would go with them.