OBJ works fine but you wont get the bone info into Poser that way AFAIK. You will have to open her up in Poser and then re-rig her there using Posers native tools. Prolly be easier to just do the final output from MAX itself unless you want to distribute her as a Poser figure or something.

As for the modelling part, its coming along decently enough. Much better then my own feeble attempts when i first started modelling, they didnt even look human much less female LOL. Have to see wire to be sure but i think the breast area needs some relooping to get rid of the squarish shape there and to connect it more naturally to the shoulder area. Using some refs of real females (which you can get from 3d.sk) will also help.