Attached Link: Travelers Morph World

I find Zbrush good for doing morphs, the morphs are easy to do once you understand the interface, but the interface its self is hard to understand, and not very intuitive.

A lot of people seem to like Rhino, seems it is very powerful, but again probably not the easiest to learn.

Anim8tor, is free and gets good reviews (but it dosnt seem to like my graphics card), this might be a good way to test the water before you jump in and spend a lot of money.

Some links to free and shairwhere modeling apps near the top of the the Modeling Forum page. Some tutorials on morphing at Travelers Morph World: http://www.morphworld30.com/tutor.html