I have the Wraith NV 2-16x, it is digital and has worked well for me, like you, I didn't want to spend a whole lot of money to only shoot hogs every now and then on a friends ranch and entry into the game.
I bought a better IR illuminator, since the one it comes with was sometimes not enough. Another advantage was that the flashlight I got for IR illumination can take different bulbs, so it can be used as a regular green light source (or red ' but I bought a green one).
As mentiones, the illuminators will have the washout effect with reflections from brush, and depending on where you position it, sometimes the smoke from firing will flash and "blind" the scope, enough that it can limit shots if not on an open field and hogs can hide.
The only thermals I have seen have been cheaper ones and the resolution of the rest of the forest looked better with the NV, albeit you can't see behind brush
