novak speedo's are some of the best esc's made to date. run great in 1/12th with no problem either using their booster or run a rx pack. I use the 1 s havoc plenty of esc for 17.5 blinky all the way down to 10.5 blinky. I also have used the new havoc sc w/xdrive in mod 1/12th and been extremly pleased with it performance with 4.5.

today I ran my 1s kinetic with booster. fast enough to be.05 from tq and win against a few Roar national champs.

I would say buy novak first just because you can get them serviced here in states. Not many esc mfg's can say that today.