Best DJ Fork??

80-100mm is standard for dirt jump forks. some riders will go longer in the travel, but on a bike like the ticket, you'd end up getting a slacker head angle and higher bottom bracket which would compromise its design.

if you need extra burliness, some riders have used lowered FOX 36 forks on their DJ bikes.

i don't have experience w/ the x-fusion, but there is a member review in our product guide here http://www.vitalmtb.com/product/guide/Forks,33/X-Fusion/Vengeance-HLR-DLA,10340

I wouldn't go any longer travel than 100mm. I don't know a single dirt jumper that uses more and very few go that far. What you really need is the stiffest springs available and heavier damping. Air forks are nice because you can just pump them up harder until you don't bottom out any more. Heavier oil often does the trick for the damping, but sometimes it can take a stiffer shim stack depending on the fork maker. I've been a long time fan of Manitou forks because they're so easy to change the travel and alter shim stacks. I haven't been inside of the newer ones from the circus on, but I bet they're still easy to work with.

As the other guys have said, you don't want to go with anything more than 100mm of travel for dirt jumping. I've had a Manitou Sherman 100mm fork for years on my p3 and it has been flawless. The Sherman has been discontinued, but I've ridden the Circus fork on a couple DJ bikes and it felt good. No complaints here from Manitou.