Here are a couple of planes I have and have had. How many real planes fly at full throttle? I also fly between 4200 and 7200 feet. I wouldn't say that they were overpowered, except for the US40 with the 90.

Sig Wonder ---- OS 25 SF
Global Gas Stick 10 ----- TT 25 GP
Modeltech Me-109 ----- OS 40 FP
Ultra Sport 40 ---- MDS 58
Patriot ---- MDS 58
Ultra Sport 40 ---- Supertiger 90
Lanier Predator ----- Jett 50
Lanier Dominator ----- Piped Rossi 45
GP 40 Size Extra 300 ---- Saito 91
H9 Corsair ---- Saito 120
H9 Taylorcraft ---- Saito 180
WM .40 P-51 ---- Saito 91