One of my all-time favorite iPhone 4 cases was the HoverCoat from monCarbone. Its carbon fiber material made it light as a feather yet durable with steel like strength. With the release of the iPhone 5 and now iPhone 5S, monCarbone has introduced the HoverCoat Plus. This improved version adds Basalt fiber along with carbon fiber to enhance both signal reception and to boost durability."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips