Bulletproof first, or performance first?

[Sylvester]

Do you guys think i shoiuld get performance first or bulletproof my maxx all the way?

So far i have G3 race suspension, g2 cf chassis, msr5 shocks, rd-lodgic cvds f/r.

Bulletproof: Fastlane Front / Rear bulkheads $75.98
7075 maxximum diffs (2) $99.98
integy aluminum diff case (blue) (2) $47.98

Total to bulletproof: $223.94

OR

Performance:Fieago 9L $80.00
Warrior 9918 $199.99
Heatsink/clamp $23.99
Deans Ultra plug (3) $8.97

Total: $312.95 + a 5% discount

i cant get everything at once because i dont have the money right now, please help me choose.