Dale, I'd like to hear a little more about what you are wanting to do with the thermal.
What animals will you be scanning for?
Is this primarily for recovering a dead animal or spotting animals for hunting?
How far will your open areas or thin brush/trees give you a clear line of sight?
If you are night hunting, what NV will you be shooting with?
Sorry for all the questions, but since it sounds like you are hoping to spend less than something like the higher end Pulsar XQ23V ($1,699), I want to see if the Leupold or Flir might work for you. Unfortunately there isn't much in between the $600-$700 options and the $1,699+ options.
Night Vision, Thermal & Accessories
Pulsar, Sightmark, FLIR, Armasight, ATN & More