Nikon Close-up

Can anyone recommend a camera that takes good close-ups of 3D objects with geometric morphometrics see?
I'm a paleontologist, and will take a lot of close-up images of deposits that must be of high quality and undistorted. I've heard most Digital Cameras cause some distortion, currently have a Nikon Coolpix and auto focus not working well for the shells. I'm hoping to beat Black Friday sales, and receives a camera will not take non-blurry distorted relatively close - Any suggestions? Thanks!
Oh ~ ~ I think maybe you've already got the idaeas. Good luck http://www.toboc.com/forum3/default.aspx?g=posts&m=905
Nikon D3x - Closeup & Personal
