I totally get where you are coming from, Stuartk. I have found that even though it is not the "purist" approach, the dBx 231S, 2-channel, stereo EQ unit does a great job at allowing me to reduce (not totally eliminate) sibilance in my hi-end system. It is extremely quiet and sonically transparent and much easier to use compared to digital EQs e.g. Beringher, etc. You can pick one up for about $300 new, and it could be an ear saver for you... I love mine.
