I'm not looking up motherboards to debate which is a better board as it won't have much affect on performance. However in most games you'll get very similar performance if not nearly identical between the 2 builds, but the I5 will be the more powerful set up over all. Also if your planning to overclock, the I5 will increase it's performance lead over the Phenom II.
I dunno, If you like modular, as in cable management or just allowing airflow. Modular is the way to go, in which i would actually recommend the XFX 650 watt Modular PSU 80+ Bronze, practically the same specs as the 650HX but much cheaper and well with the 20$ MIR you can't go wrong