I have a Loomis Skagit Dredger 13' 9". I make homemade lines though, if you get yourself a grian scale to weigh lines, or just look up the grain weight of a certain weight line on the net, you can tailor lines by buying in bulk and splicing spey lines if you want to taper like the Rio Skagit. Your suppose to make a belly aprox. 2 to 2.5 times the rod lengh. So for my dredger, 13'9", I made my belly from about 15 and 16(for a front taper) weight lines spliced together to make a 27 foot head which was then attached to Cortland Cobra running line. So instead of a hundred dollar line you can get away like a theif in the night

Also, I find these homemade lines cast as good or better than the Rio Skagit heads, and form just as pretty loops.