And again why does the revo cost more than the x4.6
Its costs more because its traxxas's best monster truck .. its their first truck with that style of suspension and its got reverse. It does have a failsafe stock. its got the most advanced suspension out of the whole list.
How ever the savage XL has the largest engine. Like a user said on here he has had no problems with his 5.9 so I'm sure youll be fine with that motor.
I'm gonna go ahead and say go with the savage XL, its big, fast, tough, and just a bad ass truck.