Khizer: I have been shooting with film SLR cameras for many years, and just recently purchased my first digital (Canon Powershot S100) and really enjoying the convenience and range of options/utilities. I am keen to graduate to APSC or FF DSLR (maybe the D4 or 1D-X if budget permits), and will really appreciate if someone could tell me what softwares I should have for processing RAW, and what is the best hardware configuration to go for in order to support these softwares?
I highly recommend Adobe photoshop Lightroom. If you are interested in trying it out, there is a public beta right now that a simple google search should find for you. If you are on a mac, you can try out aperture but honestly I have no preference and would take either of the two.
As to the best hardware configuration, you will find that you want a solid multicore processor and a fast hard drive. A raid array if you can. I also recommend that you put some money into your graphics card, seeing as a lot of features these days are GPU accelerated.