I've got a pair of 1960s A's in similar weight -- 650g over 905g. I like how quick and full their sound opens up when played open and the live sizzle they give when closed lightly. As you might expect from thin cymbals, they can be pretty lively, even at lower volumes. But they also have a few traits that could be considered drawbacks... For one thing, they might have the quietest chick of any hi-hats I've ever heard. The thin cymbals also give a different feel. There's less firmness and not a whole lot of rebound, so if you ever roll or play fast doubles on your hi-hat, you'll have to use some willpower (and good finger technique) to eke those notes out cleanly.
I look at them as a niche pair and I think you'd want something a bit heavier for the rock/blues/funk context I think you're shooting for. My usual hi-hats are a pair of 14" medium Sabian AA's (1072g over 1509g), which I find to be similar to New Beats. Something like that would probably be a better fit and give you more versatility.