That horse and saddle look really great.
Ezra
Beautiful! 
worked a bit on clint:
That’s great!
That last horse is great.
and more:
better view, close up.
little work on texture:
hope its better now ?
and another one:
update:
I think the render is better now.
hair test mental ray:
I hope its better now, have to get better eyes.
update, rendertest:
enough with the head, now its time to sculpt the clothes:
last one for the head 
vray render test:
Nice work on the render - the zbrush render is great aswell :)
Cool Shader and nice details but his head is way too flat!
The part above the eyes is to short, if you know, what I mean.
In fact, the eyes should be about in the middle of a face, you know?
Edit:
Take a look here, for reference: http://ellen.warnerbros.com/images/thisweek/1209/08-clint-eastwood.jpg 
And the ears also look a little bit strange to me, but that’s not so easy to estimate from this front perspective.