Bigone,
I think the rio spey lines are one of the best on the markets today. The Key to these lines is being able to properly match them to the rod you have. The windcutter w/ tips is by far the easiest to learn with because of it's shorter head and ability to load a rod. I prefer a line with a longer head so my fav is the mid spey which is easier to mend than the windcutter. Every rod is different even if they have the same line rating some rods need to be under lined and some need to be slightly over lined. What rod are planning on using? I hope this helps.
JoJo