I'm currently running the Pulsar Quantum hd 19a for scanning for incoming coyote. I like it but noticed my new XQ50 seems to spot coyotes better. Is this due to larger objective? At any rate, I'd like to see what you guys run for thermal scanners. Subzero operation will be common and I like the lifespan of the Quantum with the eps3i battery but the LCD screen gets a bit frozen/grainy at those temps! So what do u guys like to run?