Hi guys here's my build, its very basic:
 
i7 8700K @ 5GHz
EVGA GTX 1080 FTW
The rest standard mobo, HDD, SSDs, fans, etc nothing too crazy
 
I bought a 1000W G3 PSU though I know I definitely don't need anywhere near 1000W. In the future if I decide to add another GPU or something it may be helpful. Anyways my question is, is there a possibility having such a high watt PSU can hurt my system or electric bill? My main reason to buying this PSU is because I want as silent a PSU as possible, so my theory is that if I'm always under 50% load perhaps the fan won't ever have to turn on and itll stay cool passively?
 
I used to have an old i7 920 and EVGA GTX 285 with a 600w PSU and in gaming that thing would sound like a jet engine.
 
Let me know your thoughts and if the 1000W G3 is a good choice or not, thanks!

I have a 1 yr old Corsair HX1000i on a similar built machine that draws 425-450w during most gaming sessions and have had no issues what so ever. The psu I replaced was  a 10 yr old 1100w Powerbird that was overkill and still functioning find, just thought due to age I
 
should change it out. As far as efficiency goes the Hx1000i is rated at 92% platinum and the 450w I've been drawing the psu has been hitting 93.4-93.6% which is darn near titanium 94%, so the costs of having an overkill psu is nil.
 
Also I don't use eco-mode, I've seen 8-12c lower temps from idle to the 450w draws just by forcing the fan to run at it's lowest rpm(40%- no noise issues)

When I play games longer and PSU become warmer I turn on fan little and very fast he is cold again and because PSU is very strong fan spin on lower speed and it's completely silent, you don't know if he work or not need to feel air on back side.
In past I used 500-600W Chieftecs during 2002-2003 and when PSU was on top, I couldn't touch PC Case not PSU, later some earlier CM PSU was loud, later Seasonic Gold invented system to fan enable only if need but you couldn't touch PSU with fingers, Top of PSU case serve as heat sink and emit heat in case more than anything and because most important components inside were not so hot fan work only in reat situation and you couldn't enable him.
Now with 1.2KW no any of these problems and constant power constumption of my PSU was similar 100W more or less. 
OK 1.2KW is maybe little more overkill, but 1000W is just a little, 200-300W over real need is nothing.
Friend bring you same GPU to test SLI and that's it, or you will say my powerfull system is not capable to run one more GPU and I paid computer 2000$.

Within your budget - bigger is better IMO  --> However Quality is the Most Important feature of a PSU
 
Heat caused by the load will "age" the PSU --> So, cooler is better
 
My rule of thumb is full load = 50% of PSU capacity --> never exceeding 80% under Max loads