I feel like the Sure Lock hasn't gotten much hype since it's announcement, which is weird for a Storm ball, but everything I've seen and heard so far makes it look like a tremendous ball. Very Strong yet not too early and then flat at the pins even when there's less oil present than there should be to use it. I like your description of being able to be firm with it without worrying about it not finishing on the end.
With Storm recently discontinuing the Apha Crux and Lock there are only three current balls in their Premier line and they are all really good and significantly different. Utah has been doing a much better job with their high-end category the last couple years.
On a side note, have you had a chance to use the Hustle RIG or POW yet? I'm kind of wondering how you would compare them to the SAY and PRO.