Mind you, the G70 version won't fare that well, either... at least, not unless you want to hear the file on legacy sounds. To use whatever is contemporary (for example, the V-Drum kits or TOTL piano sounds), you have to edit even the G70...
You want the best balanced GM/GS soundset ever made (before Roland started adding Fantom sounds and the like)? Probably an SC880Pro, or something like that...
You don't need to tweak those AT ALL