My eyes aren't trained enough to detect slight differences in color rendering, But I can notice artifacts due to noise reduction and/or sharpening. I prefer both PCDU and Silkypix (only used it for 30-days trial period) in that regard.
Anyway, I'm intrigued by Capture One Express because it's a 64bit application. I may or may not like its stock output, figured it's worth a try. I can always go back to in-camera conversion.
Originally posted by Rupert I love Silkypix, and when I want the colors right, I always go there. I have used a ton of Raw converters, and for colors, Silkypix is unbeatable for Pentax shooters IMHO.
Regards!