I am not an expert jumper by any means. It's not a shot I practice a whole lot.
I use a Varney J/B and it has made my life much easier for jumping and breaking. It may or may not work for you like it does me, who knows. But, I am happy with my purchase. Whichever you choose, I am sure it'll be a good choice for you.
Please feel free to contact me if you would like more information.
Good luck with your search.
Craig