Currently my only thermal device is the Leupold LTO and I am in the market for an upgrade. The new FLIR PTS233 1.5-6x19 looks great, especially for just over $2000; however, I am seeing 640 units like the RS64 and Thor for $3500. With 4x the sensors, are these units worth shelling out the additional $1300-1500? This would be for hog and coyote hunting in open terrain in a warm environment and on a 6.5mm rifle.