FrostyMN.I actually have the Jibline and Surfline from gibbon along with a tube line as well. The Jibline is actually what I started off learning on and would be a good purchase for anyone looking to get into a more trick based line. The main differences between the classic and jibline for learning is the classic is a very stable line that is a more solid platform for balance and can be used for static poses and yoga. When learning the stability is going to be key to picking up how to slack line quickly. In comparison the jibline is a very snappy, quick line that has a lot of bounce to it to allow for tricks and jumping higher. My recommendation would be to get the jibline, it may be a little more frustrating in the beginning getting your balance and learning your form(don't wear shoes to start off with, barefooted is best), but once you start walking the full line it is going to offer more things for you to do after getting the basics. Also don't forget to towel wrap your trees when setting a line.
Yeah I've been using the Jibline for about a month and a half now (Had to put it away a couple days ago because of the snow) It really has helped my balance and because of it I honestly feel more comfortable skiing this year. I also tore apart a few old shirts to use as tre wraps to protect the line.