Blur Lt
I believe that the 160mm forks make the front end not as precise on the single track, 150 to 140 is the best height for high speed cornering, 160 would be better suited to the Nomad or maybe the Heckler, but the Heckler rides best with 150mm forks (I had one set up like that). The Blur Lt is spec'd with 140mm forks and I would probably run that for all-mountain or singletrack, the longer forks would be more suited to a little more downhill I think. There was a good write up on mtbr forums a while ago on this very thing and I used it for my set ups on the Heckler and Blur Lt. My 07 Blur Lt is setup with a Pike 140, and I find it pretty good on a lot of courses.
hope that helps
Ades