that psu would serve your purpose just fine....pretty much for a 560 ti or equivalent 500watts would be plenty. you could even get by with a 450watt psu but to play it safe 500.....some other good brands to look at are pcp&c (expensive) corsair, coolermaster, and antec....the one you picked out is a pretty good deal
Thanks. I looked into the Corsair ones and I found a great deal on a 600W one. Yay for promo codes and mail in rebates!