Barring constant load, this rig should spend most of it's time closer to drawing 40W than 120W.
The Kingwin Platinum 550W is very unusal in being efficient at low wattages. The 650W is probably not as good but hopefully it's almost as good.
So firstly, I'm really having a hard time not just buying up the ML08, since the Scythe Big Shuriken fits. I like that the case half the height of most, but I hate that it uses all 80mm fans.
So a few questions:
1) PSU seems to allow for 160mm (which includes cables sticking out). While I'm seeing people saying to make sure you keep to 140mm, I think its only if you're using the optical bay, which I won't be.
2) I don't see the Kingwin 550 at Best Buy. How does the KX-1000 compare? Its about $20 cheaper.
3) If I move my store to newegg or amazon, what would you recommend? If the price is right (under $100), then I might go that route instead.
4) I have speed controllers and a massive bag of old 80mm fans, maybe some panaflos low speeds, but I haven't bought an 80mm in years. What would you recommend?