AMD A8 X4 3850 OR AMD Phenom II X4 955

The X4 945 would be a better buy. However, the A8 3850 is both a CPU and GPU, but it's CPU performs like an Athlon II.

It's called the A8-3850, there's no X4 in there.

What do you plan to do with the system?

It's called the A8-3850, there's no X4 in there. -> But it's got 4 cores (X4)
I'm going to use it mostly for entertainment plus some virtualization.
Maybe a bit of cad.

My bad ;P

As a CPU, the A8 is less powerful than the X4-955. But it does have the advantage of good integrated graphics, whereas with the Phenom you would have to buy a discrete GPU.

Tough choice.

I plan to use crossfire/sli anyway, maybe that's gonna help.

Then it's a no-brainer. AM3/3+ mobo with a Phenom II now, and a Bulldozer later.

Kool, thanks

Since you're going to Crossfire/SLI two discrete graphics cards, then GO FOR the Phenom ii x4, no questions. The GPU in the AMD A8 will go to a waste anyways since your computer wont use it since you're planning on using a discrete graphics card. Plus, the phenom 2 performs much better than the A8.
If this helped, don't forget to rate as best answer  

This is a discussion, I'm fairly sure he can't rate it as best answer.