If you plan on running the 13.5 class and nothing faster than say a 6.5 then the RS is more than enough esc to handle that.
If you're near amain talk to Kendall. He runs our esc. You can ask his opinion as well as a few of our team drivers in the area. Blake Cannon is one that comes to mind.
We offer the size, progamability and easy updates via the Hotwire USB interface that others simply can't compete with. You don't have to worry about not having the latest esc or latest profile. You will have it just by updating your own right from your computer.
Something about winning attracts losers with opinions......
Tekin,Protek,A-Main Hobbies,KoPropUSA,JConcepts,Avid RC,MIP,SikLidz,ImagineItGraphx, FactoryRC, B-fast, www.randypikerc.com