you could split the difference with the 28mm f/2.8 IS
Beautiful shots. I'm sort of debating on purchasing the EF 35mm f2 IS USM, or the EF 24mm f2.8 IS USM. I loved the wide angle of my old 24mm on my Canon SLR film cameras. Mating the EF 24mm on my Canon 6D full frame body brings back that old film camera combination. However, I'm hearing rave reviews of the 35mm f2 IS USM lens. Both the 24mm and 35mm lenses make beautiful images. Still debating.