Please help with G2R Brushless suggestions

[Larain60]

Ive been reading these forums for a while but Im unsure about the proper setup I should go with.

Im building an G2R and will go with the single speed tranny conversion.

I want something fast but willing to sacrifice some speed for longer run times (not racing it).

How would you set this up (ESC, Motor, batteries) and what speeds / run times could be anticipated with the setup suggested?

Thanks all.