Thanks for the advice!
I'm going to be working on my own "mashup" fantasy world, taking the bits and pieces that I like from other Fantasy Worlds. I have a fair number of GURPs books, but from what I have read, the combat seems a bit more interesting in Hero system. Most likely, I'll stick with the pdf books initially until I have given them a read and put some ideas down on paper. The HD program sounds like it will be a big time saver once I get going.