Not sure about the new PSU never heard of the company but 550watts is good just wondering if the psu is reliable and solid output.
Also if your a bit tight on the budget why bother buying and Antec 900 those are like £70 or to put it in your currency its like AU $160. You could have put that money to more use on the rig. Sorry if it sounds like I'm having a go at you lol but i ain't just wondering. o well go for the psu but i suggest you find some info about it.