brushless conversion questions

[rcsammy]

hi guys
im looking to convert a buggy to brushless and hopefully race it as im geting fed up the the unreliability and hassle of nitro engine and the slowness of my brushed rustler

im hoping to get it done within a month or two(when i have enough money)
i was very impressed with the rc monster products like the motor mount, battery mount and pinions so i think i will use those to make it a bit easier, i have not yet picked a model to convert i will just see what comes up on ebay or forums.

its the brushless and lipo setup i was hoping you guys could help me with, as i will be racing in the nitro class i would like a setup which has similar performance to a nitro buggy(or even better) my budget isnt massive but i will spend what it takes to get the right setup
i have had a look around a few shops but cant realy make sence of all of the numbers, so if anyone is able to explain what it all means and suggest some good brushless setups, lipos and chargers that would be great
thanks, sam