PureGear has released two heavy-duty cases for the iPhone 5 -- the company calls them Extreme Protection Systems. PX260 ($40) and PX360 ($50) are essentially the same, with the latter boasting one extra feature. Both are hard plastic screw-on cases, offering significant protection for your device. All three buttons around the edges are covered, and there's a flip-open cover on the bottom to protect the Lightning and headphone ports. Each case comes…
