125 or 250??

I bought my '90 yz125 about a year and a half ago and my riding skills have improved extensivley. Now im am beginning to look at newer bikes...(newer for me is 97-00...i dont have a ton of money to blow on this thing..)With jobs coming up soon and making $$ i am planning to begin bike hunting soon. My only question is, stick with the 125, or go with the 250?
- i am 14 years old and weigh about 140-145
-i am about 5'9
-i ride fields, woods, and trails right now, and i go up north with friends sometimes...i plan to start riding some mx tracks, and see where my riding takes me from there.
-i do all my own work on the bike and for the time i have been around dirt bikes i think i am pretty good..i always do routine checks and maintanence.
-after selling my bike i have right now and with other $$ coming in...i might have around $1500-1750 i suppose.

Right now i have a gut instinct to stick with the 125 because i am going to begin riding mx tracks and such...and with no experience i think that would be hard to handle with a 250...But any opinions about how you guys made your transtitions from 125s to 250s would be great and what you think i should do. :cool:

hey rlp1 i notice you have a 2001 yz 125...hows that treatin ya?

Yes, the yz was the first, and is the bike i own.crf i have to say that the yz125 is a very good bike to consider. if you have no 125 experience then it may be intimidating at first, when i bought mine all i had rode was a xr 80! but from the momnet i sunk into the seat and took it for the test drive i was hooked. The suspension on the yz is very plush and easy to handle. At first the bike may seem heavy at first, then you get used to it,then you are comfortable with throwing the bike around a biut. now with less than a year of riding i am already getting the yz airborne and doing wheelies, donuts, etc. The bike feels solid beneath you, and has good mid range power with a kick ass power band. :yeehaw: Also, my yz has held up every bit mechanically, other than routine maintanence. I bought my 125 a little on the older as you may have noticed, because i wanted something i could drop and not worry about it. :) It was definatly worth the 900 i paid for it cause i am having such a blast and it runs so good :cool: my next bike will definatly be another yz because now im hooked. :worship:
As for the 250 4stroke , i love four strokes, but right now im hooked on 2 strokes for alot of reasons. There are alot of things that 4 strokes have to offer that 2 strokes dont, and vice versa. ill keep my options open to 4 strokes though, definatly