I own a 2015 Senator that just clocked 27K and the Continentals P5 on the front are just about 'howling'. I still have about 4mm of tread remaining, but, the noise is becoming unbearable. So, I'll need to reluctantly replace them. I was thinking of replacing them either with Continentals P5 (to match the rears) or Pirelli P zeros. Can someone who has changed their tyres give me some first hand advice whether I should stick with the Continentals or go with Pirellis?