Ew don't visit SF Planet unless You want to risk getting knock off poor quality products. Go look at their reviews, they're generally terrible, with a focus on people getting counterfeit products, or products that are not what they seem.
Sure, you'll far an Otterbox case for cheap, but what are the chances it'll be legitimate?
Looking at the reviews, I'm guessing the chances are somewhere between slim and NONE.
Ballistic has opened their pre orders, shipping is free to the US I think, and it's all of $8 to Canada. Better than $20 some companies (like Otterbox) charge.