crane creek double flush (?) is what I have on my 6.6 and it works a treat, great customer service as well, not the cheapest but hey ho, other 6.6 riders use FSA, both seem fine.
I use an FSA Pig DH Pro ONEPOINTFIVE on my Cannondale Gemini frame, easy to fit and it works perfectly, there are 2 versions on chainreaction, you would want the 1.5->1.1/8 steerer.
Hi, I have a barley used FSA The Pig One Point Five headset reducer, fits a 1.5 frame and reduces so you can use 1 1/8 forks. I have the top cap and a new star nut as well, (Not in pic)
Was used for about a week on my mates cannondale and then he got a new frame so didn't need it anymore.
I've got a Hope on its way, should be as good as the 1 1/8 headsets. I would also have a look at the Sunline ones, you can't use them on Intense frames though which is why i'm going with the Hope
I've got half a reducer HS in my glory, and although the sealing on the bearings is not epic like a CK, they are incfedibly easy to replace and probably cost no more than a few quid.
It allows a stronger tube interface at the bottom of the head tube but then at the same time allows the use of a regular stem as 1.5" choice is rather limited.
