Thats one is expensive $500++. If Budget $400 any recomendation?
Actually with your budget and u need the best PSU, $500 is not expensive to get the BEST PSU in the world today period.
Conclusion from Anandtech
Even though these power supplies are anything but cheap, we are confident in making the statement that the Enermax Revolution 85+ is currently the most advanced consumer power supply available. It offers exceptional efficiency, voltage regulation, temperatures, and has very good build quality. It doesn't necessarily surpass the competition in every area, but it's always at the top of the charts. Ultimately, the innovations, feature set, and performance impress us so much that we are pleased to award the Enermax Revolution 85+ our Gold Editors' Choice Award. It's entirely possible that if you purchase the 1050W model, you could end up running the same PSU for the next couple of presidential elections -- and you can do so knowing your PC will be as green as a hybrid SUV.

