My Dakar got stolen and then my KTM 950 got driven over by a bakkie so I have no bike right now.
However, yes - get the Ktm 640 cos its an incredibly brilliant dirt bike.
Just get used to the vibrations, and then use loctite as your friend.
Enjoy, welcome to the nuthouse side of things.
also, go to www.wilddogs.co.za
for n bietjie suid afrikaners wat heeldag kak praat - on bikes and stuff