Fastest best handling car under $30K dollars?

It's that time once again....time for a new car. I'm getting rid of my 2004 Mustang GT. I'm looking for the best handling fastest car under $30K dollars. What do you think? I'm not a ricer so i want nothing to do with the 350Z. An I dont like the new Mustang GT's, so whats my best bet? A friend of mine recommended the Impala SS or a used Pontiac Grand Prix GTP. What do you think?