Hmmm... might sound quite dumb, but what you are saying all the time - This is a high-poly model, but I can easily make it low-poly... Somehow, I haven't seen a single low-poly model you have made! You just say you CAN make it low-poly, but you DON'T! If you really say you can make low-poly stuff too, then please, make the arms low-poly for a small example.