Here's my situation. I autocross my car. I bought 2 rear lower and upper STOCK arms. I was going to box them, at my leisure so I don't have to have my car on a lift for a few days. Now I am thinking of getting some nice aftermarkets. I have some questions about them. Will they make an improvement in the handling especially around the twisties? I would like to get a panhard bar and all that good stuff, but you know, money. So should I box my current arms, and drop poly bushings in them, or pony up the cash and get some that will make a difference? Also which is a good brand to get?