Wondering what the consensus is here for those who are considering a CPU speed bump-up from the basic Mini 2.26 offering. Does 2.26 to 2.53 have more noticeable value than 2.53 to 2.66? Or how about the basic 2.26 jump to 2.66 at the top? This not so much from a dollar/cost added value, but rather performance. Perhaps not much value in any of these upgrades, but then why would Apple be offering these choices. Interested in thoughts.