(I'm a first time builder)
I have a total of 278 Watts, would a SeaSonic 360W 80+ Gold Certified ATX Power Supply be good for the job?
if you're using a build with something like a locked i5, an i3 or Pentium G and a HD7850 (stock), 750ti or GTX 960, the seasonic 360 G would indeed be just fine. though I would always get a 450 watt + incase you replace the gpu with something better.
It really depends. Please post your parts list.
the wattage is fine, but you can get a 550 watt xfx TS for the price and it's almost the same unit on the inside. also, that SSD and case are horrible and you should get a Z97 motherboard.
Might as well get H97 unless he wants to SLI in the future.
don't know his upgrade intentions. he could be planning to get a 4790k down the road. either that or dual gpu setup is reason enought to get a bigger psu.
you'll definitely want more power for that. Go for a quality 450W or 500W unit
for a GTX 960 you should at least get a 430 watts
but as Pureblackfire recommended a 550 watts would give you some extra watts so if you want to get another GPU in the future...
Better get 500 watts PSU.
wouldn't 500 watts overdo it?