Hi guys, I am currently researching a new wide angle lens for family and wedding photography. I shoot with a Canon with stock lens 28-135. I also carry a tele-photo lens, but do not use it often. I am wanting to get a significant wide perspective. I would love to see sample shots if you personally have a lens to recommend. I am considering the Sigma 10-20 right now, but not sure if I should dish out more for the Canon 10-22. Thoughts, friends? Thanks!