At stock speeds the kuma is better with its 2.7 ghz frequency and l3 cache ,the e5200 overclocks fairly well however it does not like very high fsb's so you gotta know what u r doing, personally i would go with the kuma,am2+ mobos are also dirt cheap so u should be good to go and it over clocks pretty well too
i acually suggest you get the new E6300 in the intel Pentium dual core range. its got a faster FSB (im pretty sure) and i higher clock speed, 2.5GHz E5200, 2.8GHz on the E6300, and i think you will ind its more overclockable. ermm, probably go with an asus or gigabyte. asus P5KPL - CM is good, but also there is a J&W board, the IP43 - S is very good, probably better then the asus one. it doesnt have onboard, but seriously, get a video card, its just SOOO much better.