What if I watch both 16:9 and 4:3? How do I pick an overall screen aspect ratio?

We find when people know they have a pretty liberal mix of both 16:9 and 4:3 we suggest going with say a 120” 4:3 screen; this is a large 4:3 ratio (96”x72”) but when shot in 16:9 gives you a 110” 16:9 ratio (96”x54”) this gives you a good large size on both aspect ratios unless of course you have a 16:9 only projector