I'm going to run a square set up with Apex 18X8.5 wheels and Hankook RS3 tires. I noticed a lot of cars using these tires at the two track events I've done so far. I haven't received the wheels yet so I'll give a review at a later date. No doubt they will be leaps and bounds better than the stock run-flats that came on my car!
2013 328i M Sport