Having owned a top of the line PVS-14 (and a PVS-4 before that), NV is a lot more fun to use, and practical for defense.
Thermal, OTOH, seems like a much better choice for detection. Camo works better with night vision then visual observation since the NV is monochromatic. Thermal doesn't care about camo, it sees the heat, and the heat is black vs white (yes it shows hot rocks, but the hot rocks are in the same place as they were yesterday.) Thermal can see into pitch black. My PVS will not see into forrest understory from a distance (ie I have a ditch across from my house covered with mature loblolly pines. I can see right through the ditch, and see the road on the far side (usually unaided, allways with optics or NV), but with night vision, I can not see into the ditch if someone were to be wearing dark cloths. Now with a surefire M1, it lights the area up, but that has its own issues.
Thermal can also be used during the middle of the day. Not useful in alabama in the summer, but in the winter.... The huge white (or black) hot thermal signature overcomes the normalicy bias of not seeing the guy prone when glassing the area. Follow up on the observation with good optics to see what the target is. And we don't get hotrocks inside the treeline, at least looking south.
If the economy were not in such bad shape, I'd buy a FLIR right now