Lots of factors come into play "for gaming". Quoting the specs... "With four PCI-E connectors (two 6-pin and two 6+2-pin), the Kingwin ABT-730MM is ideal for building up a SLI or CrossFire gaming system. " Don't know what CPU / GPU setup you have or the number of peripherals, but 730w + (4) PCI-E power is plenty for most setups.
Usually output voltages are pretty stable and within their tolerances. Over the years, I have never seen a PSU, expensive or cheap, that had a voltage out of range. (And that is something I initially check each time I buy a PSU.)
Some places make it easy to RMA components. Some do not. newegg is one of the good places. That is why newegg is first vendor of choice for many of us.