Todd, hunt for a Gen 3 system, at the minimum. Gen 2 works okay, well, it works good, but the differences in the Gen 3 systems is pretty immense.
Honestly, I'd base the PVS-14 varients as a minimum to try to get. Depends on your use, but they're most effective mounted behind a red dot, when weapon-mounted. You'll be looking at a PVS-22 type setup, to mount it in front of the scope. They're not inexpensive, by any means, no matter which way you go.