Attached Link: http://www.renderosity.com/mod/gallery/index.php?image_id=1344891

I haven't had much chance to play with either V4 or Sydney yet but I'm so far preferring Sydney.

The attached is the default Sydney materials and hair, no postwork except gamma correction.

She bends very well in the lower torso in the poser I tried on her. 

But you do have to consider that she will probably not get as much support from vendors, so less clothing and add-ons will be available. Although RDNA will probably support her quite well since they make the morph packs. 

I am debating whether to get the morph packs since the morph tool really does make it very easy to make your own morphs. If you have ever used a modeller wih soft selection then you'll find it incredibly easy. If you haven't, well, you'll still find it easy once you get going!

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire