pics of your current front and rear brakes?
you have a bunch of upgrades at your disposal. Brembo kit? aftermarket?
or? a stronger oem setup. ^^ the above advice is on point.
but if you are going to a pick n pull for calipers? just grab the front and rear calipers from a 06/07 legacy. and go from there. discs,pads,lines. . .all up to you.
yes. buy nice wheels. used, so you don't scream when you scratch them. decent tires help too. welcome to the rabbit hole.