Buying any sort of modern electronics device typically includes buying a case or holder for it, and while laptops can easily go into a computer bag you might already own, just about everyone I've seen with an Apple iPad has opted for an iPad case too, whether it's the black Apple case or from one of the increasing number of third parties offering a solution.
I've had a chance to try out a number of different iPad cases and compare them. Generally, I have my iPad in a case for protection, then mostly carry the entire unit in my computer bag or otherwise protected from the elements.
I started out with the Apple iPad Case, then switched to a Newer Technology iFolio and a Waterfield Designs iPad Smart Case, then a Macally Bookstand case and an Incase Nylon Sleeve, and have now settled on... well, read on to find the answer!