I'm newish / beginner-ish 49 y/o (5'11", 155lbs) dirt bike rider that's looking to purchase my first bike. To get myself started on riding, I had roughly 25 hours of training on a pit bike from a pro SX/MX rider on his home tracks. I then went to Austin to get an additional 15 hours of coaching on both a crf125 and a klx230r. My current plan is to do a mix of track and trail riding. I was initially set to purchase the klx but was worried that I would potentially outgrow the bike in a year or less. So now I'm looking at the YZ250FX, CRF250RX and KX250X. I realize that these are much more powerful and aggressive trail racing bikes. However, I was hoping that if I used the bikes with the "mellow" map settings that I'd be able to manage the power as I continue to learn. I was just hoping to get some guidance on which of the 3 bikes above might be a little more manageable by a rider with my limited experience. For what it is worth, I plan to continue to train this year with various professional coaches. Thank you in advance for the help!