build a gmaxx and i need help

[Maxxrickard]

i was thinking put the esc wires togheter in a serie and then have 2s+3s.but if i ues 5s2p in parallel i will get a longer time to use the car. 5s2p 5000 should be over 1h to drive.
i will use 30c

i found this store:http://www.stormerhobbies.com/
anybody used them?are they okey?

thank you neil for all your help.