The Sigma 105mm F2.8 EX DG OS HSM Macro ($1,400 list) is a classic macro lens. It can be mounted to full-frame and APS-C cameras alike, although on the latter the field of view will be cropped by a 1.5x factor. It's available for Sigma, Canon, and Nikon cameras .
Minimal distortion; 1:1 magnification; Optical stabilization; Full-frame coverage
Soft wide open; Expensive