killerbeez

Hey guys new here. I just bought a 2002 WRX and I'm looking at running a little lower spring. Now that I have the car I'm thinking I may get a an 04 to 05 in the next year or two as I like these cars quite a bit and am fond of the 04-05 look, so I'm looking at getting a set of struts/springs that would be swappable to an 04 later. And second, it's my DD I just want a little more aggressive stance that will improve performance a little without spending an arm and a leg.
As of right now I'm looking to get an Eibach Pro kit and kyb agx struts. my questions I have are:

- So I've read if I have 02/03 rear shock top hat in an 04 (later on) I can run these in an 04/05 as well can anyone confirm?
- Also it looks like top hats are recommended to swap at this time, anybody have a recommendation that is fairly inexpensive that will work well?
- Are strut mounts necessary to replace at this time too?
- Are camber bolts necessary to replace if I'm looking only for a factory alignment spec?

Thanks so much for any help, I have searched quite a bit already and still wanted to confirm these