I have a Canon EOS 20D DSLR, a Canon 50D and an old Canon EOS 10s film camera. My lenses consist of a Canon EF 18-135mm IS, Canon EF 28-135mm IS USM and a vintage Canon EF 50mm 1.8 MK 1 lens. All equipment is in excellent condition, just wondering if aside from an L lens do I need anything else to compliment my collection? I take lots of family photos and landscapes. Looking forward to your responses.