Hey folks, does anyone out there know of a micro SD card that would work with both the M3 Simply and M3 Real? I've got the simply but my girlfriend has the real and we'd like to be able to swap the SD card, etc. Preferably I'd like to find a 4 gb card, or maybe 8, if the price is right. But 4 is my ideal, I think that would pretty much suit my needs perfectly. Anyone have any suggestions? There are just so many options out there, I have no idea where to begin, or what's even compatible with one card- let alone two. Thanks in advance!