Here is a mirrorless comparison with high resolution cameras. Canon vs Sony vs Nikon vs…
Imaging Resource posted their review of Canon's entry-level fullframe DSLR, the Canon EOS 6D (price & specs). Another review that confirms the EOS 6D's excellent qualities, especially when it concerns image quality, which, as stated in other reviews, is on par or even superior to its bigger sibling, the Canon EOS 5D Mark III (price & specs).
A good EOS 6D deal is offered by top rated plus eBay seller getitdigital (>41900 ratings, 99.6% positive): the EOS 6D is on sale for .
In the conclusion they write:
With the 20.2-megapixel EOS 6D, Canon has created a smaller, lighter and less expensive full-frame digital SLR for prosumer photographers. In many ways, the well-designed 6D is a mini 5D Mark III for the rest of us. While it doesn't feature as robust a camera build as that step-up model, and its autofocus system is decidedly basic, the Canon 6D is otherwise a fantastic, responsive DSLR that offers the glories of full-frame in a trim but comfy camera body. Plus, you get full-featured, built-in Wi-Fi and GPS to boot.
Pros: Excellent image quality on par to more expensive full-frame DSLRs (including the 5D Mark III); Responsive all-around performer; Superior HD video-shooting chops; Built-in Wi-Fi with remote control and sharing features, Built-in GPS and geotagging.
Cons: Lacks a built-in, pop-up flash; No external headphone jack; Rather basic 11-point autofocus system; Mediocre burst speed.