Can do with some coilies as you can adjust the hieght or lowering springs. Av fitted eibachs on mine before. But you need to be careful when aproaching those speed bumps specially when full.
--Vectra C SRi CDTI 150--
AV seen alot talk about the raceland coilovers on here and they cost around £150.00, and at least you can drop it 30mm and if want it lower pop it 40-50-60 ect ect.
someone might give you more info on them as av never used or purchased them.