..................use Lat & Long directly from a Jepps chart for 'user' waypoints. Radials/distances although obviously can be done on almost any GPS as mentioned here I feel aren't as good at a quick glance. It's all about situational awareness. The 'plan view' as in looking directly at grids is easier (nth up for Eg.) to visualize. Personal choice really but you did ask for advice :-)
Capt Wally:-)