If your sticking at around 600 then the WRC breather (proper made one) should cope no problem, i have my atmos line hose routed a good distance underneath, plenty people run them at that power with no issues

Also i presume your car is prodomently road used and not a track car, that would be the deciding point for me

Its far too easy to get caught up with all this fancy stuff that really isnt needed for what the car is intended for