Either of those will be fine. The 8U will give you more options in terms of flexibility and programing, but either will work. My father is still flying on an 8UAPS that he bought in the late 90s. Great radio. My only warning is that if it hasn't been service by Futaba recently you might want to have it checked out. The 8U series has an internal memory battery that needs to be replaced at the factory about every five years. If not, it can cause you terrible headache from programing errors, memory loss, and malfunction.