Hoya Pro...
Although there is some debate as to whether they're needed or not - if, like me you think a UV/Protection filter should be a permanent attachment no matter what, then it pays to get the best - unless you're in a situation where the liklihood of ongoing damage is ever-present - at the moment I'm using any old thing I can get my hands on and swapping them after every third job or so...
There are some Hoya-Pro filters now on their way out to me, I'm told...seems the supply-chain has finally creaked into life after a million emails back to the UK...