motor esc and servos ???

[crawlman]

I just bought the XTM X Crawler



I need the really good servos (2)

the other ??s i have is i would like to go lipo and want enough run time I have a novak goat brushless set up and for 200.00 i can buy another brushless set up.. what kind of lipo will give me the run time ?? how long of runtime does everyone think??

OR 200.00 will get me 2 brushed esc and motors going brushed give me more choices of lipos and give me more run time??