Although we're not quite sure if it's fully worth the asking price, Spigen SGP's new Zipack ($59) for the third-generation iPad is, at the very least, a fresh take compared to the many folio-style cases we've been seeing as of late. It's composed of a faux leather exterior and suede-like inner liner, with a zipper running three-quarters of the perimeter from the top left corner back around to the bottom. Inside you'll find two straps to hold the left…