Can someone who own the SD-1 tell me if it is so much more expensive than the 900pro because it really is better? The website's description to paint a glorious picture of the SD-1 with the increased sampling memory, "live sampled drum loops", but are the sounds better or at least just as good? I have been sold on the "sweet voices" from Yamaha, but I am teased by the SD-1's ability to load in your own WAV loops to incorporate with the style creator. Can you really only import mono wav loops though? That seems counterproductive, doesn't it? I was excited about putting my ACID loops into this keyboard and marrying them to my styles. Are the onbaord drum styles mono also? Can the 9000pro's sampler be used like this too? Is the SD-1 worth the extra price or is it just more because there are less US dealers?

Can PCM sounds from other keyboards be loaded into these types of arranger keyboards?