The Nittos are fine in the rain. Just don't try out your best John Force imitation with them and you will be okay. There was a thread here not too long ago about the life expectancy of DRs. It seemed like the average for a moderately driven car was a little over 10,000 miles, so not quite what you would get from the Fuzions.
I got my Nittos for (If I remember right) about $165 a peice. That was 245/50/R16 size tires for the stock 16" Z/28 wheels. The larger the tire you need the more the price will go up.
02 SS & 00 Z/28-Gone