PX4 IMU Question

Hello everyone. We are planing to buy a Pixhawk Cube (Pixhawk 2.1) for a drone that we are building. We would like to know if it is possible to connect a more precise IMU to the Pixhawk Cube and use it’s data for positioning and navigation of the drone? If so, do you recommend any specific IMU,? If you have any expirience with this, please let me know.