If you have "the original V3" then you don't have to pay anything for an upgrade, they newest CR2 is available for free download in the 'Product Downloads' page under 'Support' at DAZ. If by upgrade, you mean morph packs and other addons, then yes, they will cost. Personally I wouldn't want any of the DAZ people without their head morphs at least. I hate having a model look the same in 2 renders. That's one of the real benefits of the Gen3 figures from DAZ. While the figure + head morphs + body morphs adds up quick, the ability to make litterally thousands of distinct people from one figure is hard to pass up. But as galactron22 mentions, they Do take up a lot of memory. Specially when you start loading in a lot of morphs.