I've be scouring around looking for what people consider great combinations of tire / rim to hook that extra power up to the pavement.
The consensus for tire seems to be the NITTO 555 as listed in this poll
What size rims fit well and perform well for the people that have added the extra horsepower that doesn't throw codes?
I've seen some people go with a smaller rim in the rear with a higher sidewall on the tire. Some shoehorn a wider tire on a stock rim that may not be safe.
I don't think going to a huge rim 22" + with an ultra low profile tire is the answer but I might be wrong. I will say I've seen some rather large rear rims damaged with ultra low profile tires by just going down the highway and hitting the seams in the road. Dented the hell out of the rim.
I'm going to reserve the 2nd post in this thread to be able to summarize the responses for later reference.