Clarks Skeletal on CRC? Use the same pads as Magura Marta and are pretty cheap too…
http://www.chainreactioncycles.com/Models.aspx?ModelID=54409
**edit** I have Formula The Ones and they’re amazing. Some folk seem to have had problems with them but thus far (with a bit of fettling – it’s important to get them centred right to avoid uneven pad wear, and the pistons didn’t quite move evenly out the box) they’ve been amazing. Ridiculously powerful with tons of modulation. I believe the Megas are pretty similar but with a two piece caliper and no tool free adjustment – no massive loss.
Main problem is that the lever throw is very long – takes a bit of getting used to, but I love it now.