General Question: AMD or Intel?

I hope this is the correct place for this post.

I was convinced to buy a new Sandy Bridge computer last month, and I go to look at prices again yesterday and found out they are no longer up for sale due to a defect.

So, here I am, back where I started. Do I go with Intel or AMD?

My starting point is this, XFX HD-577A-ZNFC Radeon HD 5770 Linky on NewEgg

Right now my system is bottlenecked at the CPU (according to the guys in TH in the Video Card forums) when I asked them about that card.

Here I am almost 1 year to the day when I bought that video card and now that I'm getting my tax refund within 8-10 days, I'm trying to piece together my new parts.

I'm not a serious gamer, but looking for a system that will let me play with settingson high. I play WoW (who doesn't? lol), Mass Effect 1,2 and when it comes out 3.

My budget is $350 for the Mobo, CPU & RAM -- yes, I can go a little over, but would like to stay on budget
I will also need a case, a dvd burner, the one I currently has no longer burns, just reads, but I found one on newegg for $19+7($26) shipping.

Please help.