In the world we leave in we have to look at every option for saving money. In my search I'm checking out refurbs lens, mainly l series lens. My main two lens I'm looking at are the 24-70 2.8 and 50mm 1.2 (or 1.4). Has anyone purchased these refurb lens and what are your experiences? I know that canon only gives a 90 day warr. compared to a year, but I could save myself about $500 on between a 24-70 and 50 1.2. Let me know what you all think..thanks so much.