I'm about to order a new iPhone 4 to replace my aging original iPhone 2G. I very seriously considered going with a Samsung Captivate instead (partly due to being concerned about the glass cracking on the iPhone 4) but I've ultimately decided to go with the iPhone. Anyway... while I don't plan on dropping my new phone, accidents DO happen. So, which case or bumper do you guys recommend for decent protection from an accidental fall or drop? Which one would be "good enough" (without going overboard) to prevent the iPhone's glass from cracking in the event of a typical fall to the ground? Any particular suggestions?? Thanks!