anything that has mirror pockets is usually a decent cover. I bought my dad a california cover like svt3183 posted. very nice quality, but expect to pay for it.
i have a wolf car cover, they are the exact same as cover craft covers, they are pricey but I have never got any scratches from it and it works awesome. I would look into their line, they have a bunch of different models. mine is a dust-top series and i love it.
maybe i got the wrong wolfcraft cover cause it sucks my left nut hard. i put the cover on over night and the next morning my car is COVERED in dust. It stays cleaner leaving it off. I guess i really need to wash the cover but still it shouldn't hold that kind of dirt in it.