Brushless Revo or brushless CRT .5 help is appreciated

[jamesbernatchez]

Im starting to lean towards the CRT .5 for right now because I can pull it off a bit cheaper. I WILL do a revo but for right now I think the CRT .5 is the way to go...plus its so cute :)

Here is the list of what im planning on(please let me know if im on the right track)

RC Monster CRT.5 Electric motor mount adapter
Castle Creations Mamba Max ESC
Mamba 5700 or 4600
Hitec HS-5245 Mighty Mini
MaxAmps Lipoly 6000mah 2S2P 7.4V Pack


Only questions I have are:

Which pinions to use with the Mamba motor and stock spur?
When is the conversion w/ the plastic spur coming out and would I use the same pinion for either stock spur or plastic?
Is 7.4v enough or should I just go with the 11.1v which obviously would be faster and put less strain on the system?

Thanks guys for the fast responses :)