I am getting ready to purchase a thermal scope, mainly for hog hunting. Shots probably average 50-100 yards, with longer shots possible. My budget is about $4000. I have narrowed it down to a Pulsar Thermion 2 LRF 50 384 or an AGM Rattler TS 50-640. The Thermion has LRF and the AGM has 640 resolution, but is Chinese. Not sure what to do here, is the 640 resolution that good?