You can create and follow i-Tracks on either variant, but you have to have the LINK to "Follow The Contour" Wes...
Having the ability to visually see which WP you can "Go To" is about as neat as it gets too, I'll get rigged up, grab a bite or take pics of cool stuff like Eagles hanging out or other outdoor gems while the TM pulls us to the next spot also.
Phil is correct on saving a few coins buy getting yours pre-installed, unless you get a screamin' deal on end of season clearance or a refurb.
Quite some time ago I got my "vanilla" PD65v2 60" for under $400 TYD and a lot of guys would like a LINK for under 1k before taxes. (I added each one over time)