Brushless motor and controller for under 700$

Hey everyone,

I'm new to the R/C monster truck world and need some help with upgrading my E-Maxx to brushless. I am thinking of running 24 cell battery packs if I can fit them on the stock chassis. What is the recommendation? I want this truck to go through soft, dry beach sand faster than this stock truck goes on pavement. I don't want to sound arrogant or anything, but money isn't really an object at this point, but I'd like to stay with a motor and controller for under $700. If my demands are going to go above $700, then so be it.

Please specify the following:

- BL Motor model
- BL controller
- Gearing needed
- Speed potential

If there is some setup that will exceed $700, can you please specify how much of a boost I will get from spending more money? Thank you all.

Brandon