In my opinion, go for Blender. Why? Most of all, it's free. You can't any better price than free. Polymodelling doesn't change after all, no matter the software. If you learn how to do simple polymodelling with Blender, you can do with any software (basically you just need to learn where to find all the necessary tools). As for unwrapping, Blender is easy. Just mark the seams and press the magic button, it's mostly there. Also, I'm in love with the "snap to pixels" function in Blender's uv-view.
I also think that pretty many users in this forum use Blender, so you can find help from here. But mostly, it's free. Less trouble for everyone when you use something that is free.
Maybe a simple tutorial should be written in this very forum.