I've got 6Gb on my laptop and it handles more then 6 poser figures without a problem. My last image has 11 figures, a mix of M4, M3, V4 and V4, clothed, morphed, hair and body textures, on top of that there are some props and on top of that 3 duplicated figures and a large fully textured building. So if I can do 14 figures with 6Gb, 16Gb should be more then enough for 6 animated figures.

Having said that, it depends on what you create around the figures in Vue. I've got another image, 2 poser figures and a building prop and I ran out of memory. Not because of the poser stuff, but everything I've created around it in Vue. On the building I first painted a leaved ivy and added to it a flower ivy. Painted grass and flowers and a moutain with an eco forest. I reached my 6Gb pretty fast and could not render the image on the laptop. No problem, since the scene is sent to a render-pc anyway.

So, it depends on the scene and it may not be the poser figures that are the problem, but what you've created around them in Vue.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk