Recently got a retina Macbook Pro, great machine. According to the specs the USB ports are 3s and "up to 5 Gbps." Anyone do any research, or can definitively say, which portable USB 3 flash drive is the best, where "best" means fastest read/write times for transferring data? Also, I can't imagine that 5 Gbps Apple touts for the MBPro port is for a portable flash drive, that seems impossibly fast for a puny storage device powered via the port. Anyway, looking for the best/fastest USB 3 portable flash, price irrelevant. Thank you.