Trying to decide what IR to get for my photon. I'm going to swap it between my 222 for fox out to a max distance of around 200 yards and on to my 22 for bunnies out to maybe 60 yards. What do you guys in the know think would be the best? i have been looking at the nm800ir, the nm400ir, the pulsar x850, t20ir and the 501bir. There seems to be quite a big difference in the pricing of the units, is this reflected in the performance of the units or are some over priced? Is the difference really worthwhile compared to the onboard ir? I have watched the youtube videos but theres only so much you can make out when your not looking at it in the flesh. Any help would be greatly appreciated.