This model from Horizon Hobby has more power than its competitors since it has a brushless motor. It comes with a LiPo battery, which is more powerful than a NiMH battery.
From Amazon
E-flite UMX Pitts S-1S BNF Basic with AS3X and SAFE Select EFLU15250
eModels
E-flite UMX Pitts S-1S BNF Basic with AS3X and SAFE Select # EFLU15250
Model Bau
Pitts S-1S BNF Basic with AS3X and SAFE Select, 850mmA-EFL35500 A-EFLU15250