So I'm very interested in getting my hands on one of the new MacBook Pros (not certain if I'm going Retina or standard just yet) and the option to change your processor caught my eye. At first I wasn't interested - after all, 0.1GHz is a really small speed bump for a pretty hefty £240 where I am. But then I noticed that the 2.7GHz processor has something the 2.6 one doesn't have; an extra 2MB of L3 Cache. Am I right in thinking this, and what difference does having more L3 cache make? Will it be noticeable in processor-heavy tasks and overall worth my £240? Thanks!