Since most members here use Window$ you will here Lightroom a lot. I know that Norm will post to this thread that Adobe ripped him off twice and will never get another dime
Download a trial of Lightroom and see if you are comfortable with it. Sadly, there is no longer a trial of Aperture available. Aperture is a Mac program, Lightroom is a Window$ program ported to the Mac.
One problem with Aperture right now is that DNG files from the K-3 are not currently supported right out of the camera by Apple's RAW compatibility. You have to convert them with Adobe DNG converter. It is probably something to do with the way the K-3 deals with white balance.
You can also try Darktable. It is open source and free.