Even though they are not as well tested yet I would probably get the smurfields instead, they are much much cheaper than the longs and from everything I have read they are holding up just as well. The guys over at pirate that bust tons of birfs get on high traction rock surfaces and floor the throttle till they get the front end bouncing and hopping and shock load the drivetrain, then guess what BANG! If you have more finesse than that I don't think you have to worry, unless you get a front tire bound up with steering at full lock and lay into the throttle. Here is a link to the smurfs:
Smurfies