Is Presentation Enhanced?

I would appreciate any thoughts regarding NGC's Multiple Holders. I am considering the aesthetics/presentation value of putting each individual series of MODERN COMMEMORATIVES into their own multiple holder, where feasible. As an example: displaying the 2006 Old San Francisco Mint Proof and Mint State $5 gold coins in the same holder as the Proof and Mint State Silver Dollars. Likewise with the Jamestown, 2003 First Flight and so on. Of course, this wouldn't work with large year series, ie: 1995/96 Olympics [32 coins!!!] I understand that a maximum of 6 coins can be encapsulated -with TWO Silver Dollars, two halves, two gold pieces.

The coins I have are ALREADY in individual NGC holders. Would each individual coin retain its present certification number for purposes of the Registry! So many things to consider----any input would be GREATLY appreciated, both pro and con.