Hi dwono,
If I were you (unless you are in a hurry), I would definitely wait for about a month in order to get NF4 board and 90 nm AMD 64 part.
My recommendations:
A64 3200 (939, 90 nm) - about 200$ - should overclock quite nicely,
NF4 mobo - it should be at least as good as NF3 250 +...