Pigeon IMU from CTRE. 2000 degrees/s and it has integration of an accelerometer and gyro so you get a drift similar to what you'd find on other top-of-the-line IMU's like the Nav-X. Even better is that you can connect it over the can bus with 2 wires rather than mucking about with I2C or any other wiring scheme. You can also wire it in through a ribbon cable to one of your motor controllers if you are using Talon SRX's.
http://www.vexrobotics.com/pigeon-imu.html
http://www.ctr-electronics.com/gadge...le-pigeon.html
We used the analog kit-op-parts gyros up through 2014. In 2015 we went to the same one that 971 uses. Did it again in 2016. The Pigeon took a lot of the headache out though.