I'm planning on getting the middle configuration (2.3 GHz i7, 1TB HD, 4GB memory for $799) but I couldn't decide if I should upgrade the CPU to the 2.6 GHz i7 for the $100 more. I went into my neighbourhood Apple store last night to buy a new Mac mini and decided to get which ever one they had in stock. I was surprised to learn they are still selling the older models with USB2. So now I am back to ordering online but I'm still faced with the same question. Is the upgrade to the 2.6 GHz i7 CPU worth it?