Would love to upgrade my rig! Need help please!

Today I got a nice rise at work. So I now have some extra cash to spend. Now I'm looking at my rig and wondering if I should upgrade it or not. SB is so damn nice and I would like to jump in but not sure it's really worth it. Ivy bridge is coming soon though. This is confusing!

So I need suggestions. Budget is $600 this time around. What does one do? CPU, mobo and DDR3 memory. Possibly a new GPU too.

A 2500K, GA-Z68X-UD3H, and maybe a second 6870 to Crossfire?

Bulldozer is just weeks away from being released. At least wait until then, compare against SB and decide for yourself.