I really like the XFX , it's 80+ silver, so is the Corsair but that's way more power than you'll need. Even the XFX 850 is more than you'll need, but I don't they sell any lower powered Silver ones in the Core series anymore. But, $110 is a really good price for it, that's actually how much I paid for mine like 6 months ago (XFX 750 bronze).
not enough power; I will SLI 480's in the near future. Plus I live in Canada, hence buying from NCIX
I could get from the states' but then I need to wait about 3 weeks until the next time I'm over at my friends.
A corsair HX750 would be the most optimal choice. It can output up to 900W, regardless of this 750W will be fine for all of your needs.
900W total, but it only puts out 744 on the 12V rail. That said, if you're willing to pay top dollar, Corsair HX series would be the one to choose (probably one of the best options on NCIX). If you're looking to spend a little less, the XFX is on par in both quality and efficiency, but also puts out a little less than the HX (the XFX would be my choice). Skip the Antecs, as they're much less efficient (and therefore hotter).
HardOCP's bench setup from 2010 pulled under 600 watts from the wall. The PSU that they used had a max efficiency of 83%. If you do the math, that would mean the PSU is only outputting around 500 watts under load.
Notice my link in the previous post was to newegg.ca, which is Newegg Canadian store. Also, with seven 3.5" and three 5.25" devices, there isn't much point to being modular...