While in China, Ewen recommended a program called Capture One Pro. It is certainly very good and I down loaded the trail version. I also down loaded the trial version of the Apple program Aperture. After much consideration, I decided to purchase Aperture. Here are the reasons why.
Both programs are good work flow programs. Both have similar features. Aperture has more features for editing individual images and Capture One is better at batch processing of the changes thus made into output files. At the moment I am keeping my raw files untouched and then processing the output into JPEG files for upload to flickr at max (1440 x 960) as this is the resolution of my monitor. In the end of the day, the features that I use exist in both programs – the histogram/curves editor, saturation and feestyle rotation. For these features Aperture is significantly cheaper (at $450 AUD, I paid a bit less than that) than Capture One Pro (at $500 USD).
So now I can mass edit my photos in Aperture and when I need some extra feautres like removing barrel distortion or fixing the perpspective I can use Photoshop.