brushless conversion questions

[rcsammy]

thanks for the advice, looks like i will wait for the MMM
unfortunatly my lhs is very bad and overpriced so i dont shop there often, mostly buy my parts online... so the upside is that i dont have to worry too much about what chassis i buy
although i do like how the 8ight has the steering servo and receiver box way at the front which would make mounting the receiver easier/neater

will i need a BEC or a low voltage protecter if i use the MMM controller?
and what sort of runtime would i expect with a 4s/5s lipo pack?(unsure of mah yet need to have a look around... maxamps are cheap are they any good?)