I had RE-01R's (previous model to the RE-11's) 225/45/18 on an 18x9 and they stretched well. The handling is better than any street tire i've ever had so the RE-11 is expected to be better. They handled well in the rain as well. I was caught in a down-pour on the freeway one night and going 70 with no signs of hydroplaning. The Z1's are good as well and obviously a lot lower in price.
If traction is your issue and you still need some assurance in colder weather, i'd go with the RE-11's.