Choosing a BL system

[spymaxx]

I have decided to take the step into BL. I currently have a stock maxx that has al bulkheads, RPM arms, and ti tie rods. My next step will be drive line upgrades and G2 chassis. After that, I plan to install a brushless motor and controller. What are the deciding factors used in choosing a motor and contoller? I don't think the Novak HV system is what I want. The batteries I have are GP3300-6cells. I think the most I would run is 6-7 cell packs. Mostly bashing, but may get into racing in the future.