In reply to smuffy: As a hacker on vipers I really really rate them. So far as an all round axe I've never had a problem and am yet to find a fault. They are much more solid I feel than the Quarks (or even Nomics) and do vibrate nicely when planted firmly. Despite the swing being a little heavier. Quarks I think come with a T-rated pick whilst the Vipers come with B, although its pretty damn tough! I found a pair of fusions cheap so I'm pretty excited to swap in some B rated picks and try those on for size.
As for the apex, never tried it and probably never will. I think the DMM range is pretty ugly in comparison, but does have the advantage of being UK orientated in their designs. This I feel is what gives them an advantage over other brands. Plus they come with T-rated picks as standard which is perfect for UK mixed use.
ps. I will admit, Grivel Matrix Tech's have the best swing and the nicest stick than any other axe I have tried.