[quote name='wateroftyne' timestamp='1349177550' post='1822741']
if the room is tricky or the FOH EQ isn't up to scratch, it's nice to have a para EQ and a notch filter, too.
[/quote]
Tru dat.
However, in the past I have used all sorts and needed to back of various frequencies etc etc. With the HPF it seems to be easier. There is a variable High Pass Filter (hence name) on it and a phase reverse and between these I have not really needed any extra control.
This is not to say that everything else mentioned so far is not a great piece of kit.