Magitech standard is about 500-800 polygons, with a 256*256 texture for infantry. That was a long time ago though, I would say the standard now is more like 600-1100, with a 512*512 texture for infantry.
You can try higher polycounts if you want. Blender has an amazing decimation tool that can be used to really hack down the polys on models. As well you can put a lot less detail in places the player doesn't see.
We all animate with Blender here, I have no idea how you can animate in max and get that to Glest... Luckily for you Blender animation is quite easy.