Bones VS Skin
Hey, dude, I've got both Bones Pro, and Skin.
According to your situation, I would suggest getting Bones Pro. It's the best
out there for Character animation, and bunch of other cool stuff. And you can
learn it in minutes.
Skin is great too, but it takes much longer to learn, and many of its purposes
are not to animate, but creating meshes. So if you want to focus on animation,
check out Bones Pro, it came with Smooth, which will join your seperate meshes
seamlessly.