I am favoring Alcor, for two reasons.

First, they offer neuropreservation, which seems preferable to me.

A majority have in fact decided to concentrate all cryopreservation efforts on their brain. For these members, it makes no sense to preserve ten times more tissue than necessary. Nor does it make sense to compromise the condition of the brain while trying to preserve a large mass of aged, diseased tissue that may very well be completely replaced during revival anyway. Brains are compact, inexpensive to store, easy to move, and are a single organ for which cryopreservation protocols can be completely optimized.

Secondly, their standby service, which minimizes the amount of time between you're heart's last beat and preservation of your brain.

These two things seem, to me, likely to give patients notably better chances to be revived without any mental degradation.