Is an rm 125 a good size dirt bike for me?

[Darkvelvet]

Im 5 10 and 175 pounds, I currently have an 04 crf150f, I was wanting to know if an rm125 is a good bike to get as I have been saving my money and really want one. But my dad thinks the crf 150 is great just because he can ride it and he says it isnt too small. But i say just because you can ride it doesnt mean its perfect. So should I get an rm, or a kx, or a yz. which is the best. yes im experienced and I want something for light trails and speed and small hills that isnt a four stroke.