Re: Switch rods..
Honestly, one of the best if not the best line to learn spey casting techniques on is the airflo scandi compact. You will also need a running line to attach it to given that the scandi is a shooting head. The running line should be anywhere between .25-.35 in diameter. There are built in loop to loop connections between a suitable running line and shooting head. Another good option would be the RIO AFS short belly spey line, this is a fully integrated line that requires no seperate purchase of a running line. I would argue that this line is less versitle than the scandi compact because it cant handle as much weight with larger flies and sink tips/ poly leaders.