Hi LisaMocha,
My mattress has both blended and all natural in it. All natural Talalay may be less durable than the blend in lower ILD’s (see post #2 here).
If you or your husband are more difficult to “fit” to a mattress because of a more curvy or athletic body type or with wider hips or shoulders than the norm then the vZone would give you more options to customize the feel and performance of the mattress to your specific body type. It’s apparently their most popular mattress but they would be in the best position to tell you it’s specific benefits for your body type and the additional options it would give you.
You can read a little more about some of the potential benefits of zoning in post #11 here.
Phoenix