No This is a another rig. My signature rig rocks and not going to touch for next 1 year.
My worry is if by any change the gpu upgraded then i will be in trouble so better 500w as high end cards only requires more wattage in single mode.
You know, there's antec basiq series you can take a look at. I am not sure if there's a 400w version, but the 300w basiq series that Antec India talked about has Over Current Protection, Over Voltage protection, Short Circuit protection, Over Power Protection and Over Temperature protection.
Just ordered FSP saga 2 500w from gadget @2.65k including shipping. Cant see at lower price.
Then , Corsair CX430 v2 gets another vote for your budget. It'll serve you well.
FYI : I used Corsair CX400 ( old version ) with GTX 560 ti and it ran without problem without overclocking. So , yours would be fine.