I recently acquired an UDOO Quad (http://www.udoo.org/).  It is a single-board computer that runs either Linux (for example, I have been booting Linaro Ubuntu 12.04 LTS) or Android 4.3 (Jelly Bean).  The Quad version that I have is roughly equivalent to four Raspberry Pis plus an Arduino Due.  It is incredibly configurable with an abundance of ports, built-in WIFI, Gigabit Ethernet, and SATA support.

I highly recommend it.  At $135 for the Quad (and Dual versions starting at $99) it is a bargain.