There are basically 4 types of Garage screens. I recommend the type that are installed by Thumper.
Thumper's Retractable Screen Doors
I have no vested interest here, I just like the quality of this type and have only heard very good things about Thumper.
I like the fact that you do not lose headroom with this type, you cannot accidently drive through it like the roll ups, and you do not lose any width like the sliding types. The one piece types are difficult to open or close with a car inside. Because of these reasons, the one I posted about is the only type I would ever consider.
Hope this helps!
Frank