NeoTouch
I use a neo touch, also made by switcheasy. I have had it for just over a week, and it is awesome! It is not sticky like silicone because the exterior is two different plastics. It is also not as slippery as an incase slider. It is easily the most protective case I have ever used.
$33 USD, including shipping
A+
Incase Protective Cover
I have also used the Incase Protective Cover. It is rubber, and feels solid. It does, however, pick up lint, and must be removed to dock. It tends to get very dirty. Also, it cannot be slid in and out of pockets as easily as the neotouch.
$30 no tax/shipping
B+
Another case I have tried was the incase leather case. It was very awkward looking, and did not fit perfectly. I did not buy it.
$35 no tax/shipping
C
A fourth would be the incase slider. It is protective and good-looking. It is also easy to dock. Problem for me is that it will not fit correctly with my invisible shield. Otherwise, great case.
$35 no tax/shipping
A
Finally, a different route is a protective cover. I use the invisible shield from zagg. It was a bit difficult to apply. It looks OK, and works well. I have one scratch on the back of the cover, but I do not want to remove the cover. I have worked with their support, and I must commend them on customer service. They are a small company that will really take care of you. If you go this route, you may also want to get one of the other cases to apply over it.
$15-front only
$25-full body
Free shipping, not taxable in most states
B