Haha thanks I wish I could act all smart like and say I knew anything about the flow rates but I dont mate
May want to ask Troy from ProSpeed on his thoughts. That or ring up a workshop like MMS/RaceTorque and ask for their opinion.
The humble VF34 is actually an awesome option on the 2.5L's. Dean @ MMS love's them and for good reason (pretty much stock response with a head of mid-range).