I also run mine at 100 hz crossover. Nobody has actually said they cross their VP100 over at 80 Hz, but they have said they cross their QS8s at 80 Hz, and that they have VP100 as well, and that their receiver does not allow separate crossovers for each speaker set, and they don't seem to have an ICBM, so a reasonable assumption would be that their VP100 is also being crossed over at 100 Hz.

Speaking of assumptions -- name that movie -- "remember, when you make an assumption you make an ass out of you and umption"

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8