I've been looking at iPad bags too.
For holding the iPad and a few smaller items I considered: CaseLogic eSling, STM Micro Shoulder Bag, CaseCrown MultiPocket Vertical Messenger and Kensington Sling Bag.
For holding the iPad and a bit more (like a Kindle, phone, chargers) I considered the Tom Bihn Ristretto, the STM Scout XS and the Timbuk2 Freestyle Messenger Bag XS.
I wanted a bag that was as small as possible (without being too snug) that would hold my iPad, 6" Kindle, cell phone and associated chargers. I ordered a Ristretto. I may have ordered a Scout (which is less than half the price of the Ristretto), but the fabrics and colors do not appeal to me.