Capture ONE Pro 4.81.
its hyperthreading enabled - meaning that it converts from RAW to JPEG exceptionally quickly
its made by the same guys that bring us those 50 grand digital medium format backs
it has a beautifully simple and easy to customize post processing format
it has excellent sharpening algorithms to fully recognize the sharpness of good prime lenses
it has tremendous custom color profile flexibility
white balance adjustments actually go below 2000 kelvin
the ability to use "styles" on it is rather similar to Lightroom's develop presets
of course, I do miss a few things on it - like the "healing brush" in lightroom, and the ability to put in digital neutral density filters as well.
for the most part, I'm a simple person, so there's very little post processing of my pictures that goes on - I have photoshop but hardly use it, iPhoto is sweet when it comes to sharing pictures on screen with friends, and apple aperture doesn't really output images of that high an image quality as C1Pro does. Canon DPP's conversion is probably the best, but its awfully slow and has a horrific interface. Lightroom is a great all in one program for arranging, cataloging, processing files and has great noise reduction algorithms, yet, I feel that capture one delivers the best out of the light box images for my taste.