H&R sport drops 1.3 on the front and 1.2 on the rear if i'm not wrong and its stiff too
i dropped mine on eibach pro-kit, 1.2 front and 1.0 rear..not that low but good enough for me and its a lil bit softer than h&r
so it all depends on ur preference..there's h&r race as well as eibach sportline, both have more aggressive drops
if u have the cash might as well get coilovers