Hey there, I'm currently running 225/40 and 265/35 Kumho MX and am having goodluck...after 15K miles they are still holding up well...compared the the RS2-Z212, these were initially softer but seemed to stiffen up a bit once a few heat/cool cycles completed...
I was initially surprised the first time i had to stop relatively fast in wet conditions, the abs kicked in before i was used to...
so...besides seeming a litle soft and giving up a little wet performance, i'm very happy with the tire...just take it easy in the rain and you should love them...
cheers,
--troy
www.tirerack.com will have the ecsta mx at a decent price
www.edgeracing.com will have the rt-615 at a decent price