The Vifa P13 midbass + XT25 tweeter w/o custom passive

OR

The Eclipse CD8443 Headunit (HU)

Either option will set me back around RM1.5k roughly.

I have Boston Acoustics S50 components for the front already so those Vifas are sort of an upgrade, I’ll move the Boston to the rear. But my HU is still stock.

So which one would you suggest me to get first? Upgrade speakers or get a better HU?