Nothing wrong with some of the bags JCrew carries if you can grab them on sale...
Keep at eye on Ebay for good deals on items with a higher MSRP, too.
I like this Hideo Wakamatsu bag my wife got me from a sale on Myhabit.com, although it is fairly inexpensive for the quality even at full price:
the 2 side flaps are just the right size for an iPad, and the interior is not too large, to discourage overpacking.
The Tumi Alpha Bravo Beale mini-messenger also has room for an iPad in the back pocket and the main compartment takes my Leica with ease.
Another excellent option is the Waterfield Designs Muzetto, available in several sizes. The inner pocket just under the flap is padded with a microfiber-lined fleece.