The 8 core from that hardware generation wasn't that great in processing power relative to the 6 core, because it was clocked really low. This meant that while many users run a wide variety of tasks, some of which can't be multi-threaded as effectively as others, the 8 core is only marginally ahead on the highly parallel tasks and behind on all others. Memory is worth considering, but you can cost effectively go as high as 32GB on the 6 core. He said 2011, meaning not the nMP, which came out at the very end of 2013.