leopard motor upgrade for outlaw obl

[Black-raiser]

Hi Guys , i just buy an outlaw obl

i smile when i look motor

obl 1500kv and only 200g for 4S !!

i want buy a leopard motor but i don't know about it , i am rooky in rc boat

4082 or 4074 ?? and what kv ??

i want use my 5S2P 7400mA 20C or 6S2P 6600 30C

i want powerfull and fas boat (50mph)

i want to use prather prop , S 225 in stock maybe need to buy other

is it good setup :

leopard 4074/1400 6S and S235 ?