I need 4 new tires for my 2000 528i with the M sport package. I am going to Oktoberfest for my first time and participating in driving school and the auto cross event (never did these before). I use this car for every day driving so I want to buy tires that will perform reasonably well on the track, but will be suitable for regular driving as well. In addition, they need to be all-weather tires since I live in NY. I am considering the following: Bridgestone Potenza RE 030 235/45 R17 93W Dunlop SP Sport Signature 235/45 R17 97W Does anyone have any feedback on these brands or suggestions on others? I would like to keep the price under $140 per tire.