If you still need input ;-)
MSV website
I am using Focus Hex Ultra 1.30 for an absolute stringbreaker. Where he would break other (1.25) strings within 2 hours, this string gives him at least 10-15 hours of hard hitting. And plenty of power AND control.
I still have a 1.20 mm set lying around myself. No I am not that much of a hardhitter, but will give it a try next time.