BL savage info? newb to large brushless

i was going to plunck 600 olus dollars to get my e-maxx running again but i decided that my savage was an easier way to go. so now comes were you guys come in. i need to knw what i should run that is realiable and wont thermal in a couple of seconds. i want to get the castle creation mamba max and plan to run 12-14 cells in my truck until i can go lipoly. im going to keep the reverse 2 speed and brakes from the stock truck. i want to know what xl motor to use as those are the ones i see about in these trucks. also any other things that i should get. for now i want to get the system in there and then later up grade it with lighter tires and whaty not. it is all stock except for the reverse. i want to run in the vicinity of 35-40 mph tops and would like to be able to use it in the sand as i frequent the dunes often. so any help would be great andi want to be able to get all the stuff from rc-monster. thansk alot and sorry if this question has been asked countless times as i want a good performing truck. thanks again
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