You need an efficient and trustworthy PSU for a modern Rig.
Corsair PSU will last much longer and they are very reliable.
If your budget doesn't allow VX450.
You can also get Corsair CX400
Or this one is also good.http://www.ebuyer.com/product/120375
Notice that these 400W PSU have higher Amperage than the one you listed(30A on CX400 vs 24A on 500W generic).