So, I am relatively new to photography, but not quite a beginner. I have a canon 60d with a 18-135 and a 70-300 lens, I am wanting to buy a wide angle and money isn't an issue, I've been, thinking about the 16-35 since they are supposed to work well with full fram censors and I'm planning on upgrading to a 5D mark III in about a 2 years, but would I be better off with a differeant lens for my 60d. Thanks.