If you drive a Vti then you need to get hold of some prelude 2.2 front calipers and carriers with mgzr 180 discs. Iv fitted these to mine and they work alot better. Well worth the money if you can find someone braking a prelude cheap
Rears dont do much braking and arent really worth upgrading from standard unless you drive the car really hard or track it but you could fit ek9 rears.
Once you've done those two then id reccomend braided lines and some good pads. Sorted
If you own an ek9 then id just go for good quality braided lines and some grooved discs all round.