Here is a example of "the lightsworn" i'm working on and he is allready 8000 polys. Since he will be one of the main characters on the project i'm planning to have him high poly.
I don't think it's too high poly for A7 to handle, but you might want to look into making it low poly and use a shader with normal mapping. You can easily use only half those polygons and get the same effect.
Other than that I'd suggest to go by the trial and error method of just testing out how far you can go.
Cause I added 8 models with spec/normal/color mapping shader on them and the models were 2k polys each (a holy hammer)and the fps dropped to 5fps in a empty room with those 8 hammers, and that was with 1024*1024 textures for each in the .tga format (3mb texture).
2000 polygons for just a hammer seems like way too much to me if it's just an object in a room. Also, 1024 x 1024 texture is definitely too much also.
Bear in mind though that it's mainly the shader that crushed your fps here, as there are only a few shaders really optimized enough to be applied to a lot of objects at the same time,
Cheers
