Best motor fit for 6s

[yuri]

Hi all, I´m going to use 6s on a xray808 with my Mamba Monster, I have already some pinions (14, 16, 17, 18, 19) coming from mike and I want to try a Medusa motor but don´t know which one to choose between 1300 and 1500 rpv.

I guess the 1300 would run more efficiently and will probably fit better the pinion range I have because it will go up to around 29000 rpm while the 1500 will fly up to 33000 so it may need more range in the smaller pinions (stock is 16). I´d better choose the 1300 one, wouldn´t I?

Thanks.