I wanna upgrade my speakers. I only have a set in the front doors right now.
I was thinking of getting four of these:
Rockford Fosgate® - P1653

What do you think?

 

Coaxials are fine for the rear, but realistically you want components up front, they sound much better and the fit has factory components anyway.

Aura 5000RPM 5-1/4" 2-way Component Speaker Pair 269-180

Are on sale right now and those are an amazing price, not sure about shipping since you are international but I am sure they could accommodate you on it.