hi folks - i have a shiny new set of fx 5.1 speakers for my spare room, which i have to admit are quite nice indeed. I have them set to 90hz crossover on my old sony db940 amp is this ok or should i go for the lower 60 or the higher 120? there is no 80 setting! Also the speakers are rated at 6 ohms though my old amp only does 4 or 8 - what should i set it to? any help as ever would be great also, anyone know where i could get some decent stands for these?