I have Blender, but I am not used to it yet. I don't have enough experience with it to do any effective modelling... yet. It's on my million item list of things to do. I will probably start devoting time to Blender in the near future, since the majority of what I am trying to accomplish can be done there much better...

Is there a program that can do retopology fairly easy?

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.