Other than gaining access to unemployment … I would quit. I think it is much better when you’re sitting in interviews for future jobs to say you resigned vs you were fired (and I’m even talking about years down the track).
Resigning to me implies you weren’t happy with the company … being fired says they weren’t happy with you! (I know you could just lie … but I’m useless at lying!).
I agree. Switching to a new job is by far the best answer. Next is waiting until they let you go. Quiting looks bad. Now if you think they are going to fire you for cause, then that’s another matter.
+1 for this. I’m not sure I would have been fired from my last job (though I would have been laid off eventually for sure) but finding a job and quitting a bad situation did wonders for my mental health, especially because my having found a job made me seem more valuable in the eyes of psycho boss. I also agree that having a continuous paycheck beats unemployment.
Now when I left AT&T I both quit for a new job and got severance. 
If you feel the work you’ve done and your conduct is above reasonable reproach, don’t quit. Make them fire you.
Not only is making life so miserable for someone that they quit a proven tactic for getting out of paying severence, unemployment, etc…if you feel your performance was above legitimate reproach, you really have nothing to lose by staying (except the stress you have to endure in the meantime). You can always explain the situation to future potential employers and it will not hurt you as much as you imagine.
In the meantime, line up other prospects. Either way (you quit with a job lined up OR they fire you and you have other options at hand) you win. In your situation, I would say the best option is to line up another job and THEN quit. But not before.
In this employment market, you are probably better off making them fire or lay you off so you can collect UE and severance.