Slash guy looking for some direction

[Jeremy1976]

I got a Slash and want to go BL with it. I already have 2 2s 5000mah packs and would like to get a 3s pack too.

With that being said, what would be a good motor/ESC combo to run in it to achieve a good 45-50mph if desired and still be cool and efficient?

I was looking into the MM and a 5700 motor but from the reading I have done I hear it sounds like there could be some heat issues with it possibly.

Also what would be a good gearing to run on this that will work with 2s and 3s and still keep me within my parameters?

Thanks guys!