First bike Questions

im 15, 125-130 lbs. and 5' 6"

im looking to get a yamaha yz85 because i dont want a wimpy fourstroke bike...its my first bike but ive ridden my friends crf230 and i ride it harder than my friend does sometimes. ive heard every side of the story about 2 stroke vs. 4 stroke and i have about 1200 bucks and ive never seen a 4 stroke run for that money. 2 strokes are a bargain and im jw if i should really get one and i have no problem with maintaining it. ive ridden a rm125 and loved it but thought it was to fast for me. im really into freestyle and i couldnt imagine jumping a huge thumper. and i would be riding trails, cornfields, jumps and just about everything else in between. anyones opinion is excepted and i just want to get some views.

should i get a 2stroke or stick with a 4stroke?

1) your physical size (both height and weight are important)
15, 5' 6", 125-130lbs.
2) How physical / aggressive are you ?
i'll put myself through anything...whatever it takes
3) what do you plan to ride- MX/SX tracks, woods, fields with friends or ?????
FMX, woods, fields, with quads and other bikes
4) Do you have any riding experience?
ive ridden plenty of times but am considered a beginner
5) Do you think you will race ?
maybe in the future
6) Are you mechanically inclined and will you be doing your own bike work?
no im not and yes i will be
7) Do YOU have a preferance to a brand/ motor choice (2 or 4 stroke)?
honda, yamaha ....2stroke or 4stroke
8) Do you have a dealer close by your home that you might use and what brand(s) does he carry?
plenty of dealers and shops ..everything except KTM
9) How much do you plan to spend on a bike?
$800-$1500
10) anything else that you think would help form an opinion
ive ridden both 2 & 4 but i loved the 2 better