I tend to use Radio nav (VOR / NDB etc), backed up by visual nav (if able), backed up by GPS....I think everyone who wants to go somewhere should have one onboard an aircraft, if for nothing else, peace of mind. You could consider it a bit of safety equipment.
As for position reports, they're perfect for that. When London info request "whats your estimate for ORTAC" you can look at the screen and read off an exact figure.
The important thing is not to rely on any one system 100% (what if the vis becomes crap, what if the VOR receiver dies, what if the GPS batteries go flat etc.), but to use every available system to compliment the others.....
Rgds
EA