i was in the same situation a few years ago, whether to buy a 970 or 770...in the end i went for the 770..unless you are gonna use the vocal harmony..don't think there's too much difference,i don't think i missed out too much by opting for the 770,and once i got the 970 styles ,,the 770 was almost on even ground...in the end just weigh up is the extra cost worth the extra features