I have a CV 60's pbass I bought used but exc cond. It was very nice. I'm sure you can find a lemon out there with anything. The sound was good, but I put in a different pickup and now its much better. Usually they are exc as are the jazz basses.I had one of the classic vibe squier p basses and it sounded very boxy and the tone knob didn't do anything, but I'm not really a p bass guy unless it's paired with a jazz pup
As mentioned earlier the Sires are getting some great reviews. Its active with the option of running passive. Just something else to think about.