I do know that with the right hop ups, a maxx can be relatively tough.
I have a sport maxx that I built, that I break very few parts on anymore. The list is:
Orion Wasp 18 engine ($90)
RPM arms ($50)
CVD's on rear wheel axles only ($40)
2 wheel drive (took off front diff and sliders)
al bulks ($60 [integy sux])
al chassis rails ($50 traxxas)
spring steel skid/bumpers (with custom rubber stop) ($40 Rc-solutions)
new era 3 point roll bar ($40 New Era)
hitec 645mg steering ($40 Hitec)
pro-line steering kit ($40 Pro-Line)
al diff case ($25 integy)
al diff cup ($50 Maximizer with mod'd stock gear)
That's $525 just in hop ups.
The truck started as a 2.5 maxx ($400),
turned it into a 21 maxx($600),
gave up and turned it into a sport maxx ($90).
The reason the sport maxx was so cheap was due to having all the crap up above already... I just needed a new engine and the orion is cheap.
Now I literally beat the crap out of the thing for 2-3 hours at a time, usually I only shut it off a couple times to re-position ramps, or drive my 1:1 somewere else to bash. Rarely do I break something anymore.