Agree with Covercraft, I'm basically happy with my Covercraft NOAH cover, it does go through hell here with heat, sun, high winds and dusts.
If you forsee that you will only need an indoor cover, and never have a need for one to stand up to outdoor ravages, then this will lower the price of a custom fitted cover considerably. And there are a number of covers to choose from.
Note the materials of such, and what you feel will be ideal for your personal needs. There may be the possibility of directly contacting Covercraft with a few models in mind, that they may be able to send you small samples of the material for you to inspect.
If there are any custom options on your vehicle, such as spoilers, etc, Covercraft and their dealer network will most likely ask you this, but be sure to if not.
Generally, the indoor covers can be easier to maintain, that they are less bulky, and can possibly be more easier cleaned in a regular household washing machine without a problem. My NOAH is so large-bulky, and due to material type is pretty much a no go for any home washing machine.
The cleaner a cover can be kept, the less chance of instilling any slight marring to the finish.