I am looking for recommendations on products that handle column level security. What is the best product out there? Any input will be greatly appreciated.
If you require a column in SharePoint to be security controlled (i.e make the column visible only to certain users), this is not possible in SharePoint.
If your requirement is that an item's security be based on the value of a column in that item, my suggestion would be to create an ItemEventReceiver that sets the item's permissions when the value of that column changes.
Try KWizCom's SharePoint List Forms Extensions:
It includes List Field-Level Security.