Taking up Photography

I was going to buy a Nikon d5100 and am now looking at the two canons, the d5100 has a problem turning out black photos, something shutter related. I believe about 1 in 100 but if you can use the warranty, which apparently is hard to get though some retailers, you may have to pay for shipping and wait 6 weeks to get your camera back. There is no time line on the problem, so buying a used one isn't even a guarantee that your camera will work properly. Could cost another $200. With the other options out there, not worth the risk if you ask me! Amazon has plenty of reviews.