So you're saying ~185% isn't enough insurance? Sheesh... I don't know a lot about computers, but I know about electricity, and that just doesn't seem right. Anyway, I'll look into.
Components regularly draw more power than they're listed at. The average power draw under full load is their rating, but it spikes up and down. You'll want to aim at maximum usage being close to 50%, because that's also the range where your psu is most efficient.
To be honest I think you're better off using my build. The video card is a bit weaker, but it's easily replacable if you need an upgrade and the other components will likely last you 6+ years. If you're really concerned about the graphics performance you could always use the IGP until you can afford the 760.
I disagree. The gpu is just too underpowered, and he doesn't need a great cpu. He did specify that he wanted a card with 2gb vram and he didn't want to use the IGP, so that leads me to believe he has more use for better graphical processing. Also, for an $800 dollar budget there's no need to spend $100 on an ssd and no hard drive.
Plexious' build is better, but still not super great because he cheaped out on several things that he didn't have to and still decided to use a 760 instead of an R9 280 (which performs better for $10 - $20 less). Your build is actually probably the closest.
Get your build with an R9 280 instead of the 760, use pentium's ram and motherboard, and find a nice psu with 500 or 550. Don't use pentium's psu unless you're a real efficiency freak, nobody needs a gold rated psu on an $800 budget