Depends on the application. I personally almost always pick power over ease of learning software. As far as quick, is the software quick to use or produce quick running programs? The latter is usually preferred. I really dont care how hard the software is to learn, I will learn it. The more advanced a software, the more features that may make programming quicker and produce quicker running programs. The cad program Catia is hard to learn but is full of features. Make the judgement on what you will be cutting. If there is any complex machining, pick the power.