Antec can be good if you get the correct one. Not all of them have seasonic parts. But that seasonic link you sent (http://www.newegg.com/Product/Product.aspx?Item=N82E16817151095
) Will work great.
I've used the Cooler Master 212 Heatsink on two different computer builds. A 2011 (i7-3820) socket and an Am3+ (8350) The max temp was 57C for the 3820 (Full load no OC) and 59C for the 8350 (Full load no OC) But if you're going to get the 212 order another 120mm fan
it takes temps down 5-7C. The heatsink comes with extra brackets for an additional fan.