Love the Z. It load, firm, fast, and fun. I commute in mine every day 60 mile each way. I get an average of 28 mpg, I have seen 31 mpg on the freeway and 19 around town. I have owned Mazda and Mercedes roadsters and this is by far the best. Others have complained of blind spots. I have none, you just have to set the mirrors correctly. I will buy again.
Seats, dependable, and looks
A better stock radio system. If you don't get the Bose the stock Radio is bad, bad, bad. Better tires the stock tire will only go about 20k.