For spinning, I've found braided line far superior to mono. It's stronger, limper, and has less "memory"--so that you have fewer tangles caused by loops and twists. It's more expensive, and it's also somewhat harder to tie and cut (clipper's won't do the job). But you'll quickly learn to solve these little problems. Also, because it's not transparent the way mono is, you need to think more about what leader to use (mono or fluorocarbon). A swivel at the end of your PowerPro (or equivalent) lets you change leaders almost effortlessly.