Mike, operating within their power capabilities, none of those receivers you list will have any "sound quality" of their own; they'll simply amplify transparently without adding or subtracting anything audible.
Although testing shows that a 80Hz crossover is about the best compromise, being high enough to allow the sub to handle the frequencies which it does best and low enough to prevent the sub from being too localizable, 100Hz isn't bad. This is especially the case if the sub(if you have one)is in a corner more or less behind an M2.
As Joe mentioned, the presence of Logic7 on the HKs is something you might want to give extra weight to.
