Net Net, IMHO you need to get a GPS.
Others might disagree, but I think it's a lot safer to fly with a GPS. The chances of a VOR, even an ILS, being out is so much greater than GPS being out. As well, you are constrained on where you can fly with only a Nav radio. The capabilities a GPS offers to navigate relatively easily to many more fixes, going direct, etc. is a not only a convenience but a safety factor as well.
As a matter of fact, IMHO to be IFR proficient you need to be GPS proficient. That should be an important part of training from your CFII.
Yeah.... things change. VOR oriented navigation is going away / gone for GA (and probably in that direction for 121 and 135 as well ?). I get to take of that VOR training I had for my check ride and now keep it in the back pocket for a back up. And I had to switch to the GPS first navigation, approaches, etc. Among other things, chances are the VOR just isn't going to be working regardless of the MON list. And I can't find a "NOTAM" for VOR list that tells you if a specific VOR is up or not.
Flying Amish with VOR is moving into the file folder along with LORAN, following railroad tracks and rivers, and reading a town's name on the water tower to figure out where you are.