AsRock H61M-S - Motherboard 69$ online. 79$ instore I just suggest online ordering then instore pickup.
The i5 2400 ($210)
G Skill 4G(2x2G) DDR3 1333 PC10600 (F3-10600CL9S-4GBNT) - 46$ online, 56$ in store.
The i5 2400 is a quad core as Pacioli pointed out. Also did you even read the rest of the article? In synthetic benchmarks which is most relative to you, "Labled Multitasking" It destroys the 955. And still kills a six-core 1075Thttp://www.tomshardware.com/reviews/best-gaming-cpu-core-i3-2100-phenom-ii-x6-1075t,2859-9.html
You seem to really like AMD. If that is your wish, you can get it. If you look at the other link.
i5 2500K vs 1100Thttp://www.anandtech.com/bench/Product/203?vs=288
The 1100T loses in every situation (minus a few), the 2500K is only a 2400 with higher stock clock (not by much) and both costs the same.