I use Cakewalk/Sonar, (I have some of them, but, actually I use the 3.0 version, is the best for midi editing) with the Instrument definitions, you can use beyond the GM sounds, you get ALL those nicer sounds, usually you download those "Instrument definitions" and paste them into the folder of the program already installed, you double click the "patch" and press configure, import and is all-ready to go....let me know if you need more help.
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mdorantes
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mdorantes