Advice On A Better IR Camera

I have some video from an IR camera (Hikvision DS-2CD2332-I) that shows a person at night, about 50-60' away; snapshot below. You can see the person in the upper left part of the picture. It isn't clear enough to make out the face, although it is clear enough to make out the person's general build and clothing (shirt, shorts and slippers). I want a better camera that would be good enough to identify the POI, with the intention to use this as evidence in court, and was wondering if anyone had any advice. Recording is done via DW Spectrum on a Linux PC. I'm thinking of swapping out the camera for either a DS-2CD4565F-IZH or a DS-2CD4585F-IZH. The specs of these cameras certainly look a lot better (8MP or 6MP vs 3MP, 40m vs 30m IR, 1/1.7" or 1/1.8" vs 1/3" CMOS). Is it safe to say that the night images from these dome cameras would be significantly better than the existing turret? Are there other better alternatives in a similar price range?

Camera snapshot

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