crt.5 lipo size and a lot of question

[remikirk]

hello .

sorry for my bad english , but i'm french
i'm the administrator of www.truggy-france.com.

i have a lot of question.
the first :

i have a crt.5 ( in order ) and i have a combo brushless ( mamba max 6900 ).
i search a lipo , but what's size is the best ? have you a links ? i want a best brand.

the second :

i have a X1 CRT pro.
i would like to brushless him.
i have a mamba max ESC , but i would like a motor , Which advise me ?

many thanks.

ps : sorry for my english