what medusa motors size 4 e-maxx?

Another Member here ran 55.7 mph top speed with the exact same setup only on 6S.

That would be me .I want the 70-2300,especially for 4s.I really like the 2000 on 5-6s more then on 4.IMO the added torque would be wasteful with the 80 can.I've pulled 52mph on the 60 with 4s,but it was more then the system could take bashing,so high 40's for the 70 should do ok.But really none of them will be wrong,as they should all work good.