So for those who are really on a budget lol - EBC rotors can help save money further (I updated my first post with links to EBC rotors and posted info below too). They are same dimensions as oem F85 rotors (395mm front and 385mm rear). I already ordered oem rotors, so it's too late for me, but maybe someone will benefit from alternative cheaper way. At this point front Brembo calipers (used) and a new set of front EBC rotors = about $1k lol - that's almost like a Honda Civic brake job - no one should now avoid this project, no excuses left guys
It turns out there are alternative F85 rotors we can use: EBC company makes GD series black zinc coated slotted and dimpled rotors - same exactly dimensions as oem F85 only a bit cheaper:
drilled and slotted
GD1813 Fronts - $228 for both front rotors!
http://www.autoanything.com/brakes/77A3068A3886088.aspx
GD1814 Rears - $209 for both rear rotors!
https://www.autozone.com/brakes-and-..._106652_0_4024
or just slotted (not drilled)
USR1813 front (haven't googled price for those yet)
USR1814 rear
Also, all prices are listed at the moment I wrote this, they may change so please check everything yourselves