just brought my first bmw so thought id sign up, so hello lol

am looking to lower the car a considerable amount, was just wondering on advice if any of you guys have done so on here?

most of the coilover set ups range between lowering 25-45mm, this is not enough! lol fk do a reasonable priced set (highsport) ones, anyone recomend? do these slam?

here it is at mo.....stock