I cannot speak for other brands.  However, in my opinion, Ag Leader is very easy to use and will do everything you need.

Ag Leader has two guidance options that should work really good for terraces/contours.

With Ag Leader, you have the option to save a group of guidance lines or you can use smartpath.

Ag Leader has Integra manuals on their website.   You should consider taking a look at them to get a better understanding of how they manage guidance lines.

Good luck!!!

Jay