I bought the Smart Cover as an impulse with my iPad 2, but now I really would like a screen protector, since I'm a bit paranoid of scratching the screen. I read that the iVisor is one of the best out there and I was wondering if anyone was using both the Visor and the Cover together. Will the Visor add a thickness that will throw off the Cover? Don't want to but both and then not be able to use one. I still have the factory plastic on the iPad. Thanks!