This will only be useful if you've also added the ability for users to rightclick or doubleclick part of the "Copy/Move with Dialog" dialog to toggle its function between Copy and Move. I've added a feature request post for the toggle functionality as well.
With both features added, Drag and Drop file management is most efficient. Instead of choosing Copy or Move before FC takes control, we can now drag and drop and choose Copy or Move in the resulting dialog box, after FC takes control.

The Copy/Move dialog in the Delphi-written DTree for Windows freeware file manager behaves like this.
http://ashbass.com/Freeware/Freeware.html#dtree