I would definitelly go with Eibachs over Intrax. I used to have the Eibach Pro Kit springs on and th eride was definitelly stiffer than stock but still wasn't that harsh on bumps. I recently installed a set of Intrax springs on my friend's MX6 and to tell you the truth, I didn't notice that much of a difference between the drop the Intax gave and the Eibachs. Like it was mentioned before, the Intrax are really bouncy and don't do well under hard cornering. I would either go with the Eibach Pro Kit or if you want a bigger drop, go with Ground Controls with Eibach springs. Definitelly not Intrax.