I went with this:

http://empirecovers-review.blogspot.com/

$35 shipped. It's strictly for indoor use but my Audi is going to be sitting in a Garage for the next 4-5 months. I know it's silly to skimp so hard on the cover but as long as it keeps dust off of it, it is all I need.

I might be asking for trouble with such a cheap cover but I figure as long as I wash and wax it before I put it on I should be fine. Like I said, it's going to sit in a garage.

The material is like canvas so you definetly only want to use this indoors. It fits alright, I think it's worth $35. It'll do the job!!