7b not bad, but the ball does not jump off of it like it does when you swing either a 4B, 5B, or a 1B.
I am blessed to own each, as well as, a SCN2B, SCN24b and SCN6b with the 5b and 6b being the most recent pickups last year.
My 4B is the most broken in and I don't think there is anything that can outhit it right now. My 1B is not quite as broken in, but is notch behind it right now. I have heard that the 5B and 4B are extremely close in performance, but so far the 4B is still outhitting the my 5Bs at the moment.
As mentioned earlier a lot will depend on whether you like one or two piece bats. If you like the 2 piece then go 4B or 5B. If one piece, go 1B (Tier 1) or a SCN2B or SCN24b (Tier 2)