If you are building a quadcopter I recommend the Power-Cube dual kit with 200A sensors because your max current is 4x 80A=320A. With two sensors you can measure up to 400A.
If you are building an octocopter, I recommend the X8 battery kit because your max current is 8x 80A=640A. You need either 4x 200A sensors or 7x 100A sensors if you want to measure this much current. You will need more batteries of smaller capacities to do this as you need to split the current such that it doesn’t exceed 200A on each parallel line.