The disagreement that I have with you, Van, is one of definition (the same as I have with TCassidy except that I think his is also being a bit mendacious with some of his objections).
You are referring to the Atonement specifically as Christ's death on the cross. I believe that the Atonement itself covers much more. Pointing to the Cross, Paul tells us in 2 Corinthians 5 that God was through Christ reconciling the world to himself (and this is a ministry that continues through us). If you point to Christ's death alone, then it does not save a soul. We cannot separate the Cross from the Incarnation, nor either from the Resurrection. That is precisely what so many seem to do. Reconciliation cannot be divorced from atonement, partly because atonement is reconciliation.
No, actually my view is the opposite, I refer to our "reconciliation" as occurring specifically when God places us spiritually into Christ where we undergo the circumcision of Christ, the washing of regeneration, and are made alive together with Christ. This is when we are made at one with God.
You can claim the two separate actions (the purchase and the redemption) cannot be separated but you have no support in scripture or logic for the assertion.
2 Corinthians 5:18-19 does not point to the cross but to reconciliation. First, we who have been reconciled have been placed in Christ, and united with Christ. Then our job, our ministry, is to spread the message of reconciliation. God is (today and to the end of the age) reconciling the world [one sinner at a time as they are placed in Christ]. No one was reconciled when Christ died, but only when they follow Him in regeneration.
To spell it out out:
1) Christ's death of the cross purchased (ransomed) all mankind. He became the propitiation or means of salvation (reconciliation) for the whole world.
2) When God transfers us from the realm of darkness into the kingdom of His Son, we undergo the circumcision of Christ, where our sin burden (what God had or would hold against us) is removed and we arise in Christ a new creation, regenerated and made alive. We are then sealed in Christ with the Holy Spirit.
This is a simple straightforward two step process, no need to confuse (and combine) the two steps.