If you're planning citations, keep it simple, go to your local pilot shop and buy the most user friendly program that covers (i.e has a navigation database for) your area of operations.
I'm in Australia and we have some very nice local products, for international ops I used to use Jeppesen FliteStar you it was a while ago, but back then you paid for a subscription to a particular area, if set up correctly it can even be used for load control.