took the clio out for a spin today,came up to three humps doing around 100,went over em and the back end hopped off the ground,came down at an angle and got into a nasty speed wobble,im convinced it wouldnt have bounced so badly if there was stiffer shocks in the back,its a valver i bought last fri,lowered 35mm with std shocks on 185/50/15s,any suggestions for rear shocks?