is it bad or unheard of to mix two types of springs together on the same car? (say...eibach in the front and H&R in the back) just as an example.

they designed the springs as a set, i.e. matching spring loads, etc. Using different springs for the front vs rears will significantly alter the car's handling to the point that it could be dangerous. Don't you like the Eibach's?

well, i know its not even been a week yet but i`m just worried that the front may not settle as low as i`d like. i know , i know......i should wait and see , but i was just going through ideas in my head just in case