The Aerosoft Huey comes as both the 205 and the 205A1. It is called a UH-1D by the developers, but keep in mind that in Germany the UH-1D is equivalent to the US Army UH-1H. Pitot on top of cabin, and such. The 205A1 portrayed has the right hand tail rotor that is common to Huey's that have the 212 rotor system.
I need to get in the Aerosoft Huey and shut down the engine so I can see if they did the 212 blades though.
I have used the ND Huey, and I have the AS Huey. I prefer the AS Huey for some reason. I like the rotor animations a lot, and it has decent sound too.
The ND Huey probably has more repaints going for it, and I think Jeansy has been putting out some great ones lately. I can only hope he makes some more for the AS Huey. I need a good white Flat Iron Huey since I am from the Ft. Rucker area and got to see the white one fly for a long time. (not hinting or anything ha ha).
Also, I did get the new Sonic Huey sounds, but have not installed them just yet. The reviews of it are great and I will probably do the install now since I have a few minutes.
As far as Cessna 337's, Carenado just put one out. There are USAF repaints for it, but I am not sure about the door-windows being O-2 specific since I don't have it. It seems to have good reviews too.
Good luck.