I am no expert. I have a decent amount of experience from buying and trying a LOT of stuff in a short period of time, but my uses are simple - just shooting at night. I do so about 6 times a year - more than some, less than some, and I don't rely on tubes to catch bad guys or defend good people overseas.
I personally have the Mod-3B with L3 white phosphor tubes, and honestly I have found it to be a little overrated. This isn't to say it's not amazing. But for the price difference, I honestly only feel like I am *slightly* deadlier in killing steel targets than with a single green 14. Sure, there is a difference. But at a price point of about $8,500 compared to around $2,000, I don't think the difference is warranted. I think the sweet spot for what I do in terms of performance to price would be either bridged 14's in a lightly blemmed but reliable set of tubes, or a good deal on a used true binocular system with older tubes, especially stuff with rotating eyepiece designs like the DTNVG or PVS15s.
The Mod3 is definitely cool, but my experience has been this: my buddies still don't care enough to shoot at night with me (for the most part), so I'm not loaning out one of the pods, and even if I wanted to, you still need to have somebody else that has a decent helmet and mount system of their own (or you supply it which adds cost). In addition, there's basically no situation where I personally would only use one of the pods when I could just be using both. Maybe for some this would be feasible.
I don't have experience with the Photonis WP tubes that have gotten really popular, but most of the user reports I read make me think that they aren't really for me. Not to say they aren't for someone else. But this is another area where I'd rather get upper echelon greens for about the same cost that will perform better with no ambient light than have Photonis WP that might leave something to be desired and require IR supplement.