There really are two different schools of thought on this. I don't think that either way is completely right or completely wrong (e.g, applying EQ after compression), but I have used filters after any fixed gain adjustments in the past with good results. If someone was going to normalize their track (which I never do), I would filter before. You don't want to normalize frequencies that are going to be removed. Cut them out first, so that your normalizing plug in can detect the proper program level and do its job more effectively.