The PSU is pretty good. There is no need for a better one. Avoid obsessed gamer and so called "gaming expert" comments. They'd think a PC only runs fine on a modular 1500W psu with golden shiny ratings covering the entire fucking case.
The truth is, with some tweaking, I run a 4-core, Intel Core I5, 4gb ram, and and HD 6670 with a 300W PSU. I haven't had a single problem yet. It is all about knowing your physics and how the Power Supply works. Most firms just want to confuse you by reccommending PSUs of 500W minimum for a Graphics that barely reaches the 50W at TDP. Wattage is a lie actually, you just need to look at the Amperage on each 12V Rail, since the others rails are irrelevant but still get added to the total wattage.