I can recommend the TeckNet iPad 2 folio letter case, which also activates the magnetic sleep/wake feature. It's sturdy, protects the device all round, and it's available on Amazon for about 11 (about $17).
you can see the green solar keyboard case . This Keyboard case for iPad 2 uses a 650mAh rechargeable lithium polymer battery that will give you 100 days of standby time and up to 90 hours of continuous use without charging.
If your into the aged leather look you might consider Joe V. Leather. By far some of the most unique leather covers I've seen on the net. Awesome quality and quick turn around. I've attached a snap shot of my cover.