West Michigan Robotic Alliance just released a new breakout board you might want to consider. The idea for the the Sentinel Talon-SRX Breakout Board was conceived after FIRST Robotics Teams 141 and 2767 had experiences with breakout boards that had compatibility or ease of use issues when used with the Talon SRX.
The Sentinel Breakout Board is used to easily connect a wide variety of digital and analog signal inputs to the Talon SRX speed controller. Inputs supported include incremental and absolute encoders, travel limit switches, string pots, distance ranging sensors, and much more. The Sentinel Breakout Board combines the most features and status reporting of any Talon interface product on the market. The Sentinel was a collaborative effort, designed and manufactured by the West Michigan Robotic Alliance.
All technology developed by the West Michigan Robotic Alliance is open-source to the FIRST community.
Sentinel Product Page at AndyMark