If I'm ripping a standard DVD to be played on a nexus 7, there is no reason for me to select Nexus 7 (1052x800) under devices when the DVD's resolution is 720x480. I may as well select the iphone4 (632x480) device and save room on my Nexus 7 for more movies. Am I correct in this thinking? Is there a more approriate setting for standard DVD's?