I'm running Nitto 555's and they are quite good. I drive mine (a heavily modded 72 with 275/40-18's all around) hard, and got 16k miles out of the rears (with a fair share of, um, tire spin
), and am up to 18k and going on the fronts and I estimate at least another 5k left in them, including autocrossing. I've heard good things about the Invo's also. They are a newer design then the 555's I have, but I'm thinking of skipping over them and going straight for the kill with the NT 05's next time I buy. They may be too much for you though, at least as far as wet weather and longevity is concerned.