Looking to get some new tires. Main reason: Autocross. Also, what kind of pressure is the best to use in the front and back? For autox I've been using 42 in the front and 37 in the back... '04 WRX (still will be used for everyday driving) Any suggestions, advice?

I have 4 17" Work Nezart wheels with Falken Azenis RT615 225/45/R17s on them. I used the tires for 2 track events and some freeway miles. I am asking $750 or best offer. I am located in the SF Bay Area.