Something with a solid blade. All depends how much you want to spend and how much you will use it. The battery powered ones are good nowadays and not as noisy as petrol. Best thing to do is go find a shop that stocks a few different types and hold them to see how they feel.
Wear some eye protection (safety glasses or goggles), and a pair of ear plugs if you are going to be doing it for long periods. And steel toe cap boots.
Cut as soon as the majority of the fronds are unfurled, them repeat as necessary throughout the year. As for sporing, I think it's mid-jul through august, depending on where you are, so get it cut before then.