I like it. I think you made a good decision in going with a PSU larger than 550W with that graphics card, especially if you plan on overclocking. Happy building.
If I overclocked both my i7 and 390, do you think I could get away with a 650w?
You'd probably be fine especially since you realistically won't be able to get the i7 much farther past 4.4GHz or 4.5GHz so that won't draw much more power anyway. When you are overclocked, you'll know if the power supply can't hold up because the system will become unstable and probably shut off on your from time to time. If that happens, you can just lower the clock.
One more question- does the motherboard have any leds on it or wifi connection?
No. The only LED on the motherboard is a small indicator light that lets you know it's getting power when your system is off. Almost like a standby light, but nothing more than that. And if you need WiFi, you'll have to purchase an add-on WiFi card.