No Bernie... quality MIDI files played through a high quality DAC are only as good as the soundfont, VSTi or whatever you are using are. I have never heard a VSTi or soundfont come close to the G70 as a whole soundset.

But if you recorded the G70 ITSELF playing those SMF's, then played that back as a high bitrate MP3 (I find 256kbps VERY hard to distinguish from the original file, in a live situation), you have the sound you are used to with no more fuss... link the lyrics, link the graphics, you are good to go.