There's a guy with a Savage flux bl on here, for a really reasonable price. I think $350, that's way cheap for a full size flux. I looked long and hard at it lol. That's the other platform I might look at personally.
But to start with a brushed Revo is fine too. Then slowly upgrade as money or parts breakage allows. That's what I have done with my E Maxx. One step at a time.