Avid arms are not good,they develop lot of play in very short time.Shimano deore/xt arms are much better choice.Lever avid sd7 or sl. I found the rockpads to have the best hold with any type of grind,cousts are close second for the rear brake and lgms third because they stop to work if the rim isn´t in perfect condition(worn grind,dust...).And of course linear slic cable(brand doesn´t matter really) with teflon coated inner cable and all lubed nicely and you´re set.