Here's 2 X60's up against 2 x SC10's. Purely clowing around, but all have a 13.5 limit. The SC10's are standard stock set up. The X60's have been toyed with but I couldn't tell you how. They may appear a little slow on the straight, but it's hard to tell just how steep that hill is on the vid.
Great fun and would love to get more people out with the trucks. Very little to do, very little to break, and they can be slotted in amongst other classes to give breathing space.
We ran the reverse track to the 4WD that day, not the greatest of ideas coming down a steep hill with bends, grippy tyres and jelly shocks.... but good fun
http://www.youtube.com/watch?v=Xli58XreQNw
If you're 50/50 about buying a truck. Do it. Satisfaction of tagging the back, watching them spin and finishing with a T-bone is worth every penny.