It has been said many times before on the forums.... I would type out some long explanation, but it would be much more worth your time to just type in, lower into the search thing and then for username put my name. This should show you one of the first questions that I asked when the boards were new. Someone explained it all to me then.
I ended up going with Eibach, Koni, Ingalls. Later.
BTW, if you are really going to do this email
[email protected]
He is the guy that has been getting everyone their stuff on these forums, he has like a continual group buy going or something

. He has great prices though and is a good guy.