G2R Setup questions

Hello,
I will be Building a G2R soon and have some questions I hope can be answered...
Heres what I have for starters....
Fiegao 540c 9L
Schulze 18.97 KWF
Spectrum DX3
MaxAmps 8000mah 7.4v x2 Li-Po ( which BTW are rockin batteries)
FMA Direct LVC

What I don't have is a truck to put this stuff in yet...

I am Planning on using the Ofna Strobe Kit as well as the single speed conversion for the maxx tranny w/ stell idler....
Also I will be going with Aluminum Diff Cups and Integy Hardened Steel Diff gear sets....

What areas of the you guys' trucks are weak and or tend to break more often than not?
Which Aftermarket upgrades aside from what i have mention'd would be better than stock parts of the revo front and rear ends....

Thanks for your help...

SkI