That ball is over 10 years old, it's probably not ever going to be much more than than a light oil ball.
For a more modern ball, look into the Jolts from Storm, Planets from Rotogrip, maybe the Rampage, Ambush, or Power Groove from Brunswick.
I don't know many people who would say that the SZ is less aggressive than Radical or PCB. I don't know that any of them would be especially good balls for beginners, as good as they all are. An entry-level or mid-priced ball will be more than enough.
SH