Wow... You went and modeled all of those sirations. You are a glutton for punishment.

Maybe you don't have a large budget, but you should look closely at some displacement-based sculpting software to compliment your work in Maya.
The expensive ones are ZBrush and Mudbox. But are you aware that there are options out there as low as $120?
Check out
www.3d-coat.com and
nevercenter.com (Silo2). I own ZBrush and Silo2 and ZBrush is king. But if you can't afford it's $500 price tag, Silo2 is an excellent alternative. And it's also a killer polygon modeler with great UV tools to boot.
I bring all this up because all of that detailed geometry is going to make your rigging and animation experience 2 or 3 times more painful than it needs to be.