Well, like everything in airsoft it's all subjective. I'm personally a bit of a gear whore, so having my Gen1 monocular and looking through a 14 was all it took for me to sell the poop tube and get the green eye. If all you are doing is running night optics on your rifle, then I guess Gen1 could suffice. I have seen/looked through decent setups (unsure of the models though), but for helmet mounting Gen2+ and higher is definitely the way to go.
And, why not just buy a 14 and a PTdub?
