Buying a motocross

[small_pas89]

I am 5foot and 5inches,and i want to buy a motocross 2 strokes (of 4 stroke if they exist )

I have the choice between:
YZ85
CR80
CR85
RM85
KX65
KX85
If you have other sugestion of bike please feel free to name them

Can you said mee wath bike should be the better and the more durable.

PS:i want to do some track riding and freestyle (so i need an good aceleration bike)

PS2:sorry for my bad english but i am a french:o

[CB750F]

KTM makes 2 85cc bikes, The SX and XC.

[carrey_sx125]

what is your opinion about ktm sx 125?is it as good as a honda cr or a yamaha yz?