I have a PVS gen III Pinnacle autogated with manual gain. It is helmet mounted. For walking/navigating in the dark, it's great. I have a Pinnacle Gen III D 740 night vision scope and a FLIR LS64 thermal handheld scanner. I was going to buy a thermal scope but am waiting. When I bought my NV, I lived in IL which has a 4 month 24/7 predator season. I moved to MO where posession of NV while in posession of a firearm is illegal, and there is NO night hunting. Night vision at the Gen III level is stable. I bought the best, and nothing better has come out.
With thermal, the technology is rapidly changing, so are the major providers. Armasight is getting together with FLIR. Both have some nice products with questionable customer service. Trijicon and IR Defense have great products, but their prices are a lot higher than they should be. Pulsar has great products, customer service, reasonably priced, and is very stable. Thermal you buy today will likely be obsolete in a couple years, and you will lose a lot of money. I would like to get the original $6,500 I paid for my LS64 like that guy selling the you saw. Another thing I would like to point out-i assume you are interested in predator/varmint hunting like me. A lot of the even brand new stuff coming out has a bigger objective lens BUT at the expense of FOV which is a lot more important in the limited view areas of the midwest. Notice how a lot of the videos showing thermal are showing hogs and deer? Those are big, relatively easy to hit. Coyotes, raccoons and possums are much smaller and harder to hit. A fast refresh rate is a good thing, as is manual and auto refresh (NUC). Smaller micron size is better
If you can navigate by red flashlight to your spots, that will save you a lot of $$ vs a night vision device to navigate. A handheld thermal scanner with a wide FOV is essential. You need to be able to see coyotes coming a long way off to get ready to kill them. My FLIR can show heat in red. Once you spot your quarry, you can go a lot of ways. You can use a red and kill light, you can use a cost effective digital night vision scope ($500-700) with an IR illuminator ($250-350) at closer ranges (150 yds max), you can use a dedicated night vision scope with 4-6x magnification, the benefit being positive ID, and last you can use a thermal scope.
If you want to start in NV, the minimum to me, is a red flashlight to navigate, a thermal scanner (like a flir ps 32 and similar), and a digital nv riflescope (like a sightmark or Pulsar digisight) and an ir illuminator. A thermal scope would be the last thing I would get right now. I would let the technology and industry mature and settle before jumping in. I may have the best of all worlds right now. Some guys who bought thermal scopes are actually going back to thermal scanning/nv shooting. I'm sure I will buy a thermal scope someday but am waiting for all the reasons I gave you plus I will be more motivated when I move to a place I can use it without travelling out of state.