I got a chance to fly the EC-145. It was a manufacturer owned version of the UH-72 that they use for training. I walked in to room that Airbus had set up and one of the pilots asked me if I was one of the people to test fly the helicopter. There is only one proper answer to that question. YES!
It is a great flying helicopter, but I just can't see it as a trainer. The autopilot on it is significantly more advanced that Navy fleet helos. I don't know the cost per flight hour, but it has to be significantly more that single engine solutions. I think the Army is using it because the knew they needed a new aircraft that that was the only other one they had.
The Bell 407 was the clear front runner. They were doing full autos (I don't feel like this is a requirement, but it doesn't hurt). It had a G1000 console. The pilots even folded the rotor blades one night. (This is actually a pretty big deal. Our hangars aren't designed to fit palm-treed helicopters. And they can still be trucked back.) They even painted in orange and white.