i got the acura car cover. fits like a glove and works great in my opinion. i had it on and the car garaged for 9 months and when i took off the cover dust was barely at all noticeable. they are kinda expensive but in my opinion worth the money.
I got a custom car cover from Auto Fanatics made by CoverCraft for around $200.I got the Noah version which is waterproof yet breathable.I have the type r fin and the cover fits perfect.They email you a car worksheet with where to measure and you fill in the measurements and email it back to them with a pic of you car.Took me about 2 weeks to get mine and the quality is way better then the Acura cover,so if you can wait a few weeks for it to be made don't waste your money on it.Heres the link to their different covers.I will post a pic of mine on the car in the morning so you can check it out. http://www.autofanatics.com/carcovbycov.html