Best Gaming CPU for 150$

I have 150$ to spend on a CPU.
For a gaming Rig. I want to get the best performance from 30-40-50 Player multiplayer Battlefield 3 (Forget singleplayer)

Ive heard the i3 2120 recommended for highest performance PER Core. But its dual core limited. I would rather go with Quad core. Ive heard Multiplayer large maps can give the i3 2120's trouble. I know gta4 wouldnt run on most dual core.

So Im trying to decide between the

AMD 980 x4
AMD AMD A8-3850 APU
AMD fx 6100

Its looking like the 980 x4 would be the safest bet.

The A8 3850 is well ahead of these chips on this benchmark page, But I guess thats non Gaming.
PassMark Intel vs AMD CPU Benchmarks - High End

I guess the 980x4 is the best bet?

Is there anyone here thats dead sure the i3 2120 can run 40 player Multiplayer Battlefield 3 better than the AMD chips?
Or will you really notice no difference?
I would imagine the AMD 980 x4 would win all around.

Sorry for the double post. I was not able to delete my last New Thread, and it became cluttered with other discussions about too many pieces. So i simplified the question.

( Mobo and other parts are not a question atm, I can get those also)

I will be pairing this new CPU , board, ram, PSU with a
Radeon 6870 HD Card.

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http://www.youtube.com/watch?v=B_d8bpupml0
http://www.youtube.com/watch?v=cCIWsc9ZoWY

980 cpu - 6870 Video showing around 40-50 FPS in these youtube videos.
With Ultra - 1900-1000 resolution. I would be happy with High 1600-1200 if it will stay at 60 fps.

Im just wondering which is going to pull out ahead under heavy 30-40 player combat in the end.

the dual core i3 2120 or the amd 980 x4.
I think ill stick with the x4. it should be a pretty close call. Gta4 and others should like the x4 best also.