I use Capture One LE. A bargain, in my view.
I also have PS CS1 which has Camera RAW built in.
But, I am a slave to the histogram at the processing stage and the histogram in C1 is superb - very sharply defined on the screen, background grid, seperate RGB channels indicted by lines, and best of all, shadow, highlight and mid-tone sliders at the base of the histogram.
The Camera RAW histogram, on the other hand, is crap. Fuzzy on the screen (compared to C1) no RGB indication and no grid. I hate it.
But, I accept it's horses for courses. In my work, I try to do all of my colour correction in C1. I also set density there using the sliders.
Like I say, a bargain. C1 Pro on the other hand, is a rip-off.