Coilover Help

I want to upgrade buy some adjustable coilovers and shocks. I was thinking about either dropzone or arospeed. I hear alot of people talking about how these brands are junk, but none of you got adjustable shocks to go with them, why, was it lack of funds or knowledge? Which company is better dropzone or arospeed? Which adjustable shocks would work best with either one of these brands? I'm trying to stay in the range of $500 for the coilovers and shocks together. Can any shock work with any coilover? I don't want to spend the grip of money on these because I still need to get sway bars and strut bars. please help