A good budget Sig 9mm would be the P6. It holds few rounds, but certainly adequate for plinking and self defense and has a nice grip as a result of the single stack magazine.
In CA lower capacity pistols make sense, why have a master grip setup holding 17 round magazines if all you get to insert is a 10 round magazine?
I am saving up for a Swiss SIG.
https://gundigest.com/article/sig-p6-remembering-a-west-german-icon-of-the-cold-war