i don't recommend traxxas at all. too much money needs to be spent on upgrades before it reaches the same quality as a 1/8th scale truggy/monster truck.
the revo has weak diffs and transmission gears. but i can see you already know this since you brought spider gears for your revo, rpm gear all around and aluminium carriers, which would have set you back heaps of $$$. from my experience, traxxas vechicles only stand up to abuse if you continually upgrade them.

get a quality truck out of the box like a mugen mbx5t, losi 8ight t or jamin' crt. get the pro version and build it yourself.
the jammin' CRT pro kit cost me $575 from towers ($600-$25 discount).