Well first off two independent receivers that out perform any single receive HF rig that are way more expensive than the 6400. The portability features to work remote via other devices and the outstanding customization of great audio this radio can produce..
Art: I know this is off topic, but what brand/model is that SWR/WATT meter next to your Flex 6400? I have not seen that one, looks rather useful. [I am also going to order a Flex 6400 or 6600 in May after tax season here.]