I was looking around online and noticed a HUGE price range in the 16GB microSDs. I've noticed between 30 and 88 dollars. And then I realized that there are apparently classes (Class 2, class 4, class 6 are what I've been seeing). What class should I be getting for my Droid Inc? What is the class of the 2GB card that shipped with it from Verizon, because the 2GB card seems fast enough. Or do you need a high class for such a large card? I know nothing about these and want a good deal but don't want my phone lagging!