Ageing has several causes, including the accumulation of clutter (basically poison) inside and outside of our cells. I'm not sure becoming a vampire is enough to overcome that.
Given the uncertainties, I'd still want to keep cryonics as a back up. (Though it looks unavailable here in Western Europe.)
The wear and tear theory of aging is just one of many currently popular, the body is not a mechanical machine necessarily bound to wear and tear, it can in some cases successfully heal itself, some species basically don't age (some can actually revert in lifecycles).
Given the uncertainties, I'd still want to keep cryonics as a back up. (Though it looks unavailable here in Western Europe.)