At this very moment I'm using my Pro-83 to listen to the CHP, and it's working absolutely perfectly. Bear in mind that, especially with CHP's low-band frequencies, your best reception will be with an antenna that's designed with lower frequencies in mind, regardless of which scanner you use. I'm using a Diamond RH77CA with it at the moment, but frequently use my R/Shack 20-032 magmount. Surprisingly enough, though, even the cheapo, high-loss rubber-duck that came with the Pro-83 does a better job than I would have expected. Not terrific on low band, but I do hear stuff that's close enough to be of much interest.
If you're looking to get a Pro-83, you'd better look fast though. They've already been gone for a month from most of the Shacks around me. They've been discontinued. And at $69 it's really hard to go wrong.
You may also want to take a close look at the Pro-99 currently going for $99. Although intended as a race-scanner, you can operate it in a conventional manner. (press Function-Car to toggle)
It's small, cheap, and also has PL decode, which might be very useful since the CHP uses PL on many of their frequencies. Here at the house I have a few interfering carriers from my DSL modem which land right on some CHP freqs - the PL decode helps to keep me from going crazy.
Having 16 character programmable alpha tags is also very nice.