In 1/35, the Academy, MRC, and Italeri boxings are all the same kit, with a couple different decal options. It is a great kit and can come out nicely straight OOB. With either Cobra Company or Verlinden's upgrade sets or some extra effort and TLC, it can look awesome. There was a great decal set, now out of production, by Two Bobs Aviation Graphics that can still be found from time to time called "Whiskeys in the Mix" that had a bunch of good-looking schemes on it too. Eduard also makes a couple PE sets for it too.
Here is a great step-by-step build review of the Academy AH-1W at Aeroscale.
I have built a couple and they can come out great. I highly recommend them.
I am not sure which is best in 1/72. I believe the Italeri and Revell ones are the same molds as well though. The two companies rebox each other's products pretty regularly.
Good luck.
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