So far as we know, there is no perfect breakout board for the talon SRX 10-pin “data port” connector.
Most of these can be answered yes/no for each board.
used/tried ever by Eastbots
access to all data port functions without switching to a different board
support for 3.3v and 5v analog sensors
simple, pure passive hookup board: no extra components
power status LED
limit switch status LEDs
3-pin connectors (ground,power,signal) for active limit switches like hall-effect sensors
encoder status LED(s). full set of three (A/B/index), or partial?
10-pin male connector for hookup to 10-pin encoders, while still using limit switches
somthing to aid in CAN bus daisy-chain hookup
(TODO: discussion about which of these we think are important)