I would not have added my Hella 4000s to the front had I known the HIRs would be so bright. You can still tell when the hella lights are on, but it's not that much brighter than the HIRs. I guess I could go to 100w bulbs in the Hellas but how much does a person need anyway. I think it's the best bang for the buck of any mod i've done.
I got mine from this guy. He was very fast and knew a lot about bulbs.
HIR Headlights 9011 9012 bulbs