Have you had a look at the BeagleBoard?
Or maybe something like this http://www.nvidia.com/object/jetson-tk1-embedded-dev-kit.htm... ?
Or maybe something like this http://www.nvidia.com/object/jetson-tk1-embedded-dev-kit.htm... ?
However, this Nvidia TK1 seems like a perfect match, It is bit expensive but definitely worth investigating more.
Thx for the info!