i like the 4 hole around the socket method tht swiftech mcx462 and alpha pal8942 heatsinks use
ax7, sk7 are a couple of other good heatsinks, however they use the socket lugs (which i find a bit unnerving having such a heavy heatsink, ive heard many stories of lugs breaking off, however it seems to be minimal nowadays. jsut be sure not to kick your case around )