Thanks for the tips guys. I found this website,
Car Cover USA, and am going with the
Evolution, by Covercraft. It's an indoor, 4-layer, breathable, ready-fit cover, and they already have one for the 370Z. It has mirror pockets, and they even have different covers between the Basic and Touring, and Sports package (taking into account the spoiler), so it should fit well.
At Car Cover USA it is sold for $169.99, and you can chose between blue, gray, or tan exterior color. It has a 4-year warranty. you can get it shipped ground for $10.
I'll report on the quality of it when I receive it. Thanks everyone for the help.