You get a Spey specific line. Since you're starting off, get a skagit floating head if you're just doing pike and walleye. Skagit heads are the easiest to cast, and good for starting off. Make sure you buy the right running line diameter for the head (which will probably be 35lb slick shooter or gripshooter from rio). Rio has a whole bunch of info on Spey line selection and even a chart that will tell you what grain your rod specifically needs.
Good luck