Pulsar is my choice, their flagship XL50 is a very nice scope. I believe it's the same sensor as in the Merger XL50 binos, which are the best thing I've ever bought in terms of thermal/NV. I still mainly use the older XP50 because I use subsonics at relatively close range for most of my nighttime work, but would like to be able to stretch the XL 50 on coyotes eventually. Just don't have those long open shots on my ranch, 300 yards is about as far as I reasonably can go, and 99% of shots are within 100 yards there.
There's also the Pulsar Duo, it's a pretty cool little toy with both thermal and digital color for daylight. Not as good as a dedicated thermal or real glass optic, but it lets me see the reticle view on my phone and helps coach my boys a little on the target, and we can watch replay later.
I put my Thermions into Spuhr one-piece mounts. Makes changing to a new rifle very easy, no dealing with ring alignment/ minimizes ways for the scope to shift relative to the base. They're expensive but so is the scope itself, I figure something a nice as these scopes deserve a solid mount.
I'd like to hear more about your ATN issues. I have a Thor 5 and their new sensor is on par with my Thermions. I wouldn't say as good as the newest Pulsar sensor, but directly competes with the most recent prior generation.