With HD video recording, great image quality, and a solid selection of lenses, the Nikon D5100 and Canon T3i are on the top of a lot of wish lists out there. For people already in the Canon or Nikon camp (full disclosure: Im a Canon man), the choice is obvious if an upgrade is in their future, but for the less dogmatic and new recruits to the DSLR crowd, its not nearly as clear-cut. $800 buys you a lot of camera either way.
Head-To-Head Review: Canon T3i Vs. Nikon D5100 | TechCrunch