I play through MB combos which are house amps at two local clubs. An FDeck HPF is very helpful with those. The high input impedance tames the piezo quack and cutting the low end junk really tightens up the tone. Still, the GK MB150 will be diff it to replace.
I own both an MB112ii and now an MB110. I would absolutely use a HPF with the 12, but I don't think it's needed with the 10, at least to my ears. In any case, the amount of lows needed to be shaved off would be greatly reduced on the 10.