if everything is done correctly the sheilding can remain in place as i found image and also sound noise is reduce. but what some users are forgetting is if you add heatsink (let say a GFX card) if you ground the heatsink image seems a little bit sharper as lease here on my system.
the same appiles here too on my test sound card,background noise is reduced.
if you have hot componets you could try somekind of link to the sheilding,using it as a heatsink which iv seen one user here on this site has already done.
