Which program would you recommend to animation RWBY and/or Hyperdimension Neptunia?

[fluffyclouds]

Okay, so I've seen very good GMOD/SFM's of RWBY or Hyperdimension Neptunia. I was wondering, if I wanted to make like an episode/short.movie t of RWBY/HDN, would you recommend G-Mod or SFM? Also, should I get Sony Vegas Pro 14 to go deeper? I downloaded SFM, but it only has TF maps. Can I create a really good animation if I use the programs I listed? I'm willing to invest a lot of time and patience to learn and create really good animation. Thank you for your help.

[Quint the Alligator Snapper]

RWBY early on used Poser but then they switched to Maya, I think.

Early episodes of RWBY didn't seem to have animation that great, fwiw. But it worked I guess. And they did make some snazzy fight scenes using it.

[僕の名前 (仮)]

I didnt liked how animation rig work in SFM (making custom rigs even worse). Maya will be better and easier to make animation. Also you can get cel shader render for it.

GMod is worse than SFM for animation.

[Kats]

Tried out MMD?
AKA MikuMikuDance, it's free.