An On-Camera flash is not needed because I have a Canon 430ex II. I feel more safer having a better build quality.Do you think my want for a 5Dc is complete sane? or is the 5Dc not a viable option anymore.I used a 5D and 40D for 4 years and currently use a 5D3 and 7D, mostly because I do shoot sports and other things in ridiculously low light levels.