If you already have the shutter, than getting the shu-ta probably wouldn’t be your best bet; unless your really into finger spins, or your vry conscious about the kind of metal your yoyo is made of.
That leaves us with two options: the Level 6 or the revival.
Personally, i would go with the Level 6 due to C3yo being a little more in the competition area, while YYJ is just starting to make a comeback at the yoyo community after their short disappearance.
The overall shape of The level 6 makes it look more stable, and better for all kinds of play, IMO, and has the ability to finger spin, which i’m not sure the revival can do.
So if this isn’t enough to help you choose, you can just search up some videos of player playing them, so you can get a little taste of how the throw will perform