WAIT a few months, or until Q1 2007.
Various ways you can go -
1) AMD dropping prices across the board by around 50% end of July. ($500 FX-62 anyone

)
2) Conroe - Launches in July, but won't be available to Mr average till around September (most peoples guess).
3) Wait till Q1 2007, lot's of new stuff coming.
My next big one will be Q1 2007, choice between -
Top range dual core Conroe ($1000 + mobo + mem)
or if price cuts pan out
2 x dual core FX-62's (yup total 4 cores) on a Torrenza motherboard. ($1000 + mobo + mem)
or if cheap enough
1x K8L (4 core CPU) on a Torrenza motherboard with 2nd socket spare for GPU, co-pro or physics processor.
Unless your desperate it's real good time to hang on a little.