Okay, I don't typically respond to these posts, but give the kid a break.
He's trying to START. Yes, the KTM is absolutely THE best 125, with the ZOOK close behind. BUT, the KTM is too damn much for him, and you know it. NEVER having had ridden an 02 RM125 (eh hemm,...the most forgotten clarification on this board), a recent review (DirtBike??) says the power is not only awesome on top, but manageable on bottom, and the ZOOK has always had the smoothest power outlay. Of all the 125's, this might be the best one for you.
But as a starter, a 125 is a bit difficult for ANYONE. All the so-called powerbands on these things are pretty sharp and peaky.
I'd say if you want to start on a 2-stroke, just go with a KX100. They're still wicked fast, but probably more manageable than the harder-to-ride 80's like the CR or YZ. The RM would be close behind.
However, you might want to start on a small 4-stroke to get the handle on the balancing act, turning, etc. Something like an XR or TTR. :) It depends on how much riding you have done on others' bikes. If you've ridden friends' 80's or 125's, and feel "relatively" comfortable, ok.
Remember that smaller is not easier. In fact, I think the truth is closer to the opposite. I ride a KX500, which is a monster that can pull down cement bridges no problem, but when I get on an 80 or a 60, it's VERY hard to handle. James Smith likes the 125 better than the 80. Destry got his butt kicked once on a KX100. etc.
Best wishes, and ride hard.