New single-board computer by Sinovoip - Banana Pi M2+ (BPi-M2+).
This model of SBC is very small (65x65mm), but you find a lot of performance for your project.
E.g. quad-core ARM A7, 1GB DDR3 SDRAM, Mali400MP2 GPU, 8GB eMMC, 10/100/1000Mbps ethernet, 2x USB 2.0, 1x USB 2.0 OTG, microSD card slot up to 64GB, IR reciever and WiFi and Bluetooth with connector for external antenna..
SBC supports OS like Debian, Android, Ubuntu and so Raspberry Pi Images.