You stated:
(G 800 styles imported in a G 1000 sound worse, due to a lesser dinamic range of the 1000).

I don't believe that at all. If anything it is because the G1000 has so many MORE sounds that you need to re-assign the tones in the style to match the old set up. You are simply used to the older sound table, or maybe you DO actually prefer it, but the dynamic range is not reduced. Maybe you had a different velocity setting on the keyboard, or the tone you listed to reacted differently to your ears. The fact remains: The G1000 is an UPgrade all the way. I, myself find a few of the older sound bank tones more pleasing than the newer ones too, but it's taste, nothing else. Giove the 1000 another shot before you waste alot of money on a new sound module. You'll love the new storage and control of the G1000, not to mention the improved effects.