If you want accuracy I think you need to look at Lightwave , Modo, or one of the higher end apps. Since it sounds like a hobby I would go with Poser and Bryce .   Poser simply because it has better animation controls than Daz studio.   

You might chack out www.contentparadise.com , they have a passport membership and you can get Poser 6 for $2.50  if you become a passport member . The passport membership gives you discounts on products from the store for some things .