Your house is burning and you can only grab 2 lenses from your kit, the rest will burn. Which 2 do you HAVE to have? For me, I'd say my 70-200 2.8 Mk II and my 24-70 2.8 Mk II. They are my newest and cost a fortune, but I love portrait work with my 100 2.8 L macro. I guess I can order another when the insurance kicks in haha.