If it is for traveling and want to stay light going WA or UWA is far better. When I travel for work I have multiple 1Dx and a host of lenses including a 400/2.8L IS and a 70-200/2.8L IS. When I travel for fun I bring an a7r and a 28-70. Makes you be creative and gets awesome results. PLUS you aren't carrying around a bunch of stuff.