Heliocopter Sims

It’s been almost ten years since I last played a Heliocopter sim. It’s not that I don’t like heliocopters, I love them, but a good sim is hard to find. The last I played was Longbow by Janes. Great sim, so realistic that my friend Jim and I had to play together, pilot/gunner. The trouble was that in was developed during a time where PC hardware was evolving too quickly, and its hardware support is limited to a very tiny window in PC history.

Can anyone suggest a good heliocopter sim? Not something arcady like Comanchee vs. Hokum, but something sophisticated like Longbow. Neither era nor nation matter to me.

Thank