which lipo?
 

i currently run a zippy R 3S 4150mah lipo in my rustler
i want to get another lipo so i can stay out a bit longer before charging again
im stuck between:
Zippy R 5000mah
SPC 5000mah
and TrueRC 5000mah

they are all around the same price, so which one would you guys say is the best for quality and performance?
or are there any others i should be considering?
thanks, Sam