Nikon 1 walk-about lens
A f/2.8 might be larger than the 30-100. A lens that fast might be more money. But, it would be the only lens you'd need for a vast majority of situations. You would want other lenses for sports and wildlife., and maybe a super-wide for, well, to have a super-wide. For super wide interiors or landscape, I can hand-hold a panoramic and stitch them together.