Question: How Do I Know Which Software is Right for Me?
Answer: The answer to that depends on what you want to use the software for. Deciding if you'd rather work in 2D or 3D will narrow your choices down significantly; once you've made that decision, it's a matter of knowing what functionality that you want or need, how much you'd like to spend on software, and what your system can run. Measuring those requirements against the features, price, and system requirements of the available software applications will help you choose the software that's right for you.
