In reply to StevenRogers: i've used the wired BD hex's a couple of times and they seem ok, but i'd never get any myself, prefer slings on my hexes.
i learnt to climb borrowing a friends WC rockcentrics and they were great and i currently own one small one (pink sling). i also own one DMM torque nut and think its great (the yellow one) it sits a bit better than the WC ones and cams a little better. the rest of my hexes are CAMP hexes on cord which are great, glad i managed to get some of them.
all the types have their pro's and cons and if i were to buy again now i'd probably get the DMM torque nuts and then fill in any missing areas with the WC rockcentrics. i wouldn't get a full set of rockcentrics though.