Fair enough, the Pi killer is a dual core 64 bit SoC with a GB ethernet port, a SATA port, a 1080p/60 capable GPU, and support for 2 - 8GB of DDR4 memory. That is like the 21st century set top box thingy, and possibly throw around computer. At a MSRP of < $50 (which makes it killer) (PSU, case, ssd, monitor etc all extra of course).
It's still 32 bit, only has 1GB RAM and it's $91 at Digikey, but the Olinuxino A20, from Olimex seems to meet just about all of your other criteria.
I've only used the A10, which is $42, but single core, no flash, no analog audio jacks, and for some maddening/expensive reason, 0.05" headers, instead of the 0.1" on the A20.
It's a little behind the bleeding edge of Linux (still at 3.4), but I've been able to port an app from a beaglebone black to this with virtually no headaches. In fact, it's been nice, since there is no device tree at 3.4. Best of all, it's readily available, unlike the BBB.
