hi everyone i have a 03'mazda 6s and am trying to figure out what brand CAI and lowering springs to get. Ive been looking at AEM and Injen for intakes and dont know what to choose...or if i should go with a no name brand one from ebay and get a K&N cone filter.

And for springs ive been looking at eibach sportline springs....

what has everyone else used or just recommend...i dont know much about cars and am looking to make my car a little better.....after i get these taken care of im going to look into exhaust systems(when i get more money saved) and probably some window tinting(not as important as performance to me)

can anyone help me out....thanks