There are plenty to choose from but all have very specific things they do.... if you're not just looking for something to get you by, I honestly would research covers... that was suggested to me once I started looking and it was advice that helped me buy two car covers so far. One for my 07 and one for my husbands 93.
I have the Covercraft Evolution ($220ish) for my car - the 07 and purchased the Covercraft Weathersheild HD ($349) - which was I extremely impressed with.
Most covers allow moisture to escape - which means, moisture gets in.... so just don't think after a rain storm your car will be stone dry.... :happyhapp when I pulled up in the driveway with the 07 during a rain storm and saw water beading and running off the Weathershield on the 93 - I was very pleased. I purchased the Weathershield for the 93 because of a few factors. We live in a high bird area - we have a black roof on it presently.... I didn't want to get all the staining on the car and the roof... also, we'll be buying a white top at some point and also wanted superior protection from the elements for the car and top.
It really depends on what you are looking for....
To protect from sun
just to cover and keep dust out....
It took me a while, but with Gary Pauls initial help - i was able to decide on covers that work best for us.... It's no brain surgery, but I really only want to buy them once.