In reply to Cadairmanuk:Hi there,
I thought my perspective may be of interest having had the same dilema.
I climbed for years on the old old old charlet moser pulsar straight shafted axes. When they started making a hook for the bottom of the hand that was it. I tried a mates pair of BD Vipers on steep ice on a trip to Ben Nevis. Loved them, for the next trip I went and purchased a pair - they were great. Unfortunately, money troubles forced me to sell them. A year later, I came across a bargain for some new quarks, got them as an impulse buy. Was up on Ben Nevis again a few weeks back and I have to say I like them more than the Vipers - the only reason is the Tiblock, it prevents your fingers bunching at the hook at the bottom making them more comfortable, also I found I had better lateral control because of the tiblock (when your fatigued it is sometimes difficult to swing the axes true so it doesn't bite, forcing more swings). The Vipers are great axes, but the Tiblock on the new quarks makes all the difference in my opinion.
Hope that helps