im wondering if the ktm 150 sx is a good bike because i might be getting one, stepping up from my 08 ktm 85L. how does it compare to the ktm 125 sx and the ktm 250 sx-f. i weigh about 45 kilos and im 14 years old and im a fairly good rider (i can beat some xr400s and xr500s on my 85). thxx