I have been doing some checking. Most models with some detail made with most 3d modeling programs have ploy counts over 1500.
For doga the poly count goes up for rounded surfaces. I remove those and replace them with semi rounded and I drop the poly count.
DOGA is by far one of the easy 3d programs to learn, and it is quite powerful. Like you said though, there is an issue with its exporting and importing abilities.
I make no promesis, but I am trying to learn 3ds max in my spare time. However I don't know why I would want to given the fact that even 3ds max will not export models in direct3d (X) format without a costly plug in module.
Blender is most likely the better tool for what I need, but seems to have issues still. But is by far a very powerful 3d modeling tool for the price. (Free).