Last month I purchased a couple of Odroid-C1 units which looked interesting because for the same $35 as the Pi you got a slightly smaller SBC with approximately 6X the power.
Pi CPU: ARM 700MHz, C1; Quad-core ARM 1.5GHz
Pi GPU: 24 GFLOPS, C1: 54 GFLOPS
Pi 2 USB 2.0 ports, C1 4 USB 2.0 ports
Pi Ethernet: 100MB/s, C1 Ethernet: Gigabit
Both the Pi and the C1 draw approximately 3 — 4 watts when idling."
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