After this thread: http://singletrackworld.com/forum/topic/150mm-forks-revs-v-ts-8-v-deville and having a quick ride on some new Kashima Float 36s, I decided my riding/ability/wallet couldn't run to £900 worth of fox fork, especially as they seem a bit fragile.
Ended up with the last set of these in the uk: http://shop.upgradebikes.co.uk/Catalogue/Suspension/X-Fusion-Slant/X-Fusion-Slant-DL2-DLA wasn't sure I wanted the DLA but chatting with Freeborn decided for the little extra weight/complexity it'd be worth it especially as the Axle to Crown of these is at the top end of what Cy recommends.
Shall fit them next week and report back.
I'm maybe looking at buying some X-Fusions in a 120mm guise later in the year... Interested in what they ride like...