The other point of view. I love 1000 :-) It is enough punchy and nimble on corners, not quite 600, but I can have a lot of fun on it. But in the terms of a comfort ride I'd say 1000 is better. Much more torque make me lazy :-) Can use 6th gear from 30mph onwards. had 750 before (and many, many more, but lets stick to recent one) with very similar power 750=126bhp vs 1000=145bhp so not big difference, but I don't have to keep high revs on my 1000, and don't have to switch gears so often.
But everyone is different, so test it before buy.