I agree, iPad and Kindle are two different products that have different specifications and functions. They may look the same but let's face it, Kindle is basically an e-reader with the benefits and features of a tablet. iPad on the other hand is a cross between a laptop and smartphone.
You might want to check this shoulder bag from ColcaSac MacBook Shoulder Bag, a Hemp Messenger Bag for MacBooks and iPads.. It can fit a laptop and iPad, also has pockets for other gadgets such as mobile phones.
The sleeves from ColcaSac are made from environment friendly materials, the sleeves provide a snug fit to the iPad and there are different cool designs available.
:)
I don't like any case but I do worry for a sleeve. I can take my ipad with me without an ipad sleeve, it makes me not rto worry about any kind of damage that can happen to my gadgrt while I am on the way. I am using the Zagora model from Colcasac.