i had a choice between the 600 and the 700 when the 700 came out. my reason was over 400 dollars difference plus i use the organ in my ipad which i think is better(subjective). i compared styles and for my needs i chose the 600 i could npt see that much difference. im not saying that the 700 is not worth the upgrade, just for my needs the 600 was a better value. i couldnt come up with the extra money.