I've ordered and am waiting on the delivery of a folio style case for my 3G iPad, intended to be removed during use. What I really want is one of those soft gel or snap-on cases that I've seen advertised. I'm hesitant to buy one for fear that the case might interfere with 3G reception by covering the entire caseback. I've yet to see a model with a cutout or port for the 3G antenna. Any thoughts?