stock = well..ur just stuck with stock..if wanna use stock i recommend get M-Sport suspension..
adjustables = got fully & semi adjustables..fully u can set ur stiffness level and height..semi only can adjust stiffness but not height (or vice versa?)..also some only allow to adjust front sets only..more expensive ones can adjust both front & rear, stiffness & height..recommend to get KW
if got budget better go for adjustables / coilovers..can tune it to suit ur comfort + performance level..else go with the normal Bilstein + Eibach combo..or H&R etc..
i'm not a sifu..but just would like to share my knowledge n little experience..
happy hunting..