Brushless system

[Rduncan]

Hi,

I am looking at putting a 13.5turn brushless system running off a 1s 4500mah 45C lipo into my mardave but am looking of a bit of help and understanding of the brushless systems out on the market at present.
What should i look fo in the motor as the mardave are light should i look at getting the highest KV possible against the highest power rating (for example the lrp x12 has 241watts and 3050Kv where as the tekin redline has 201watts and 3500Kv)
For the esc should i look at getting the highest possible current rating! and how do i match the current rating required by the motor to the esc!!
I have to currenlty run a smart booster but I see that most new esc have a bec does this then mean that i will not need to run the smart booster!!

Thanks for the advice in advance