Everything is a trade off.
I have the Fh25r. It fits my needs very well. Huge FOV, small and compact so that it will fit in the breast pocket of my shirt, has a very good 640x512 sensor, 12pm pitch with mk,40. The mk is interesting with some offerings being lower, but I find the lower mk, while defiantly showing more detail, at times its too much, making the target blend in more, the extra detail acts like it has a form of thermal camouflage. The fh25 has a target identification mode that seems to cut out the detail when engaged and shows a more stark heat signature . I find it far better for quick scanning.
Can take stills, vid, apps the the phone, has a range finder thats consistently 700yd capable, a laser pointer( which can spook deer if you turn it on while trying to hit the range finder button :angry:)
Internal battery life is ok but not great but then its a very small unit so Im happy with it.
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