Couple questions about lowering and getting new wheels
 

Alright so I want to lower my car on Eibach sportlines and I'm thinking of getting the XXR 530's but I want to know what else ill need to get besides the actual rims/tires and the springs. I've been reading other threads and I'm getting confused about anything extra I'll need (spacers, hub centric rings, etc). So if someone could let me know exactly what I'll need to do/get id appreciate it.
Thanks

SPC rear lower control arms. My car had the rear camber all out of whack after just lowering it 1". Installed the arms and got an alignment closer to stock spec.