The two most important pieces are a high-quality head-set and a foot-pedal to rewind/fast-forward. After that, a good ergonomic keyboard is very helpful. That's

The two most important pieces are a high-quality head-set and a foot-pedal to rewind/fast-forward. After that, a good ergonomic keyboard is very helpful. That's the bulk of it, but you can find other ways to spend money such as specialized software and hardware.