So im currently using avid ball bearing brakes on my heckler, i guess you could say i ride aggressive all-mountain. Im looking for some disc brakes that offer more modulation than my bb7's and excellent power. I have heard nothing but good things about the new XT disc brakes and i have also head nothing but good things about formula brakes. The Mega and K24 brakes look like they would suit my riding style (leaning towards the megas). Which brakes should i purchase? XT's or Formula Megas? K24's? i will also be running 180mm front and 160mm back. Looking for some insight and opinions.