SB-E will be intel's top dog until haswell arrives in 2013.Intel may release some 6C IB models in late 2012,but it will be positioned against SB-E as 2600K is positioned Vs 6C Westmere now.
AMD will have 10C BD+ based Komodo,with 25% more cores and 25% more headroom for Turbo(counting GloFo's CTI program ).So it will be 10C komodo Vs 6C SB-E or in the worst case for AMD ,8C SB-E.