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Should add that I'm leaning towards the I2; found a new tan one for $700. My only concern is will my illuminator be ok with this. I think it should but would like confirmation.
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You'll probably be just fine with an I2. It might not be strong enough for the older Gen Orion (what gen is it?), but if your PVS 7 is Gen 3 you'll be fine.
Alternately, post this same question in the NV Forum
Here or ask a mod to move it there.
CQBL doesn't have any IR Illum. Vis/IR lasers only.
D2 has IR Illum (LED based) and it has a TON OF THROW meaning you (under your NOD) can see the Illum WAY out beyond the distance you can reliably ID a target with your NOD. It can also be adjusted to use as a flood. It's also the biggest and heaviest of your options. The glow from the LED Illum is reportedly visible at 50 yds or so if you're looking directly at it. (don't try that yourself, it isn't good for your eyes).
A3 has non adjustable (or a very limited adjustment range) Laser based IR Illum (IIRC).
@TNVC_Sam will suggest ATPIAL-C due to easier zeroing procedure and less noticed issues needing return to the company.
2 other new options (if you don't mind spending the coin) are
DBAL A4 (which adds white light and 2 separate IR LED Illum, flood and spot). $1600-1800 and not out yet. This LED Illum is only visible within a 1* axis and only under 10 yds. So it's pretty freaking covert.
http://www.ar15.com/forums/t_6_18/478216_Press-Release-Steiner-DBAL-A4.html
BEMeyers MWAL which uses Laser based Illum and is the absolute bees knees for IR Illum. $2500! (You read that right!)
https://tnvc.com/shop/b-e-meyers-mawl-c1-ir-visible-laser/
Frankly, I'd suggest upgrading your NOD before buying a $1500 or more LAM, but that's just my opinion.