BL-Revo 9XL + ??

[kulangflow]

I'm going to be running my 9XL with my MM controller on 4s lipo/14 NiMH, but I have a feeling that I'm going to want more voltage for the 9XL.

I'd like to go to 5s or even 6s eventually, so I'm trying to plan out which esc I should get to replace the MM, which is only super-reliable on 4s (so I hear).

I see that many are going with the Quark or MGM for $275+.

Is there any reason I shouldn't go with the BK 9920 for only $125?

Thanks,

Brian

Driving style: bashing, speed runs, maybe racing someday...