I am with Logger, if you are using a thermal to detect and a NV scope to annihilate you cannot get much better than than for the money, especially at longer ranges past 200 yards, here in Florida a 200 yard shot is not very common as little open areas to allow that, your environment sounds to be more open than mine.
As far as the D740 vs Raptor, just look at the front objective on that Raptor, it pulls in allot more light than any D-740 can, plus with a focusable IR illuminator you can take a shot out past 400 yards. That Raptor is a first class NV instrument.
Sounds like you know what to do already!
P.S. no matter what setup I am running on my weapon though, I NEVER leave the house without thermal detection!