I like California Car Cover. Nice, but spendy. I guess their model is built around the fact if you have a car nice enough to cover it, you are willing to pay a premium.
Agree with California Car Cover 100%. Best covers I've ever had. Made specifically for your car model and fit very well. They also have a variety of cover material to choose from depending on if you just want to cover up in the garage or water resistant/proof outdoors. At the Grand National Roadster Show a few years ago a buddy of mine had their booth rep come over and measure his '37 Plymouth so they could make up a cover for it. Check 'em out - you won't be disappointed by either the fit or the quality.