Yes they are much better than the series you currently own, zbt is an entry level, the A series is a professional cymbal. As far as if they are worth it, only your ears can determine that. Head to a store and try some out to see what you think.
Me personally I think they are worth is as I play A and A customs and have for 3 decades now. But I strongly urge you to hear them for yourself at a shop. You can pick up 5 A custom cymbals of the exact size and weight and each one will sound different. I've put many a cymbal back trying them out till I found the one that sounded best to me.
It's a good idea to have someone else hit them so you can stand back 10-15 ft and hear what they sound like from the audience perspective, the sound is different from what you hear behind the kit.