I am planning on getting a 570 by spring or the summer, and I don’t know if the power steering is a needed option or if it’s something I could do without? Also I am wondering if anybody has had any issues with the 2015 or 2016 570s? I was reading a thread on here about problems some were having with the 2014s and don’t want to have those with a new machine. What does the warranty that comes with them cover and is an extended warranty worth buying?